1 | <?php |
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2 | /** |
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3 | * Validator.inc.php |
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4 | * Code by Strangecode :: www.strangecode.com :: This document contains copyrighted information |
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5 | * |
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6 | * The Validator class provides a methods for validating input against different criteria. |
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7 | * All functions return true if the input passes the test. |
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8 | * |
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9 | * @author Quinn Comendant <quinn@strangecode.com> |
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10 | * @version 1.0 |
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11 | */ |
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12 | |
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13 | // Known credit card types. |
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14 | define('CC_TYPE_VISA', 1); |
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15 | define('CC_TYPE_MASTERCARD', 2); |
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16 | define('CC_TYPE_AMEX', 3); |
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17 | define('CC_TYPE_DISCOVER', 4); |
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18 | define('CC_TYPE_DINERS', 5); |
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19 | define('CC_TYPE_JCB', 6); |
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20 | |
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21 | // validateEmail return types. |
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22 | define('VALIDATE_EMAIL_REGEX_FAIL', 1); |
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23 | define('VALIDATE_EMAIL_LENGTH_FAIL', 2); |
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24 | define('VALIDATE_EMAIL_MX_FAIL', 3); |
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25 | define('VALIDATE_EMAIL_SUCCESS', 4); |
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26 | |
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27 | class Validator { |
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28 | |
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29 | /** |
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30 | * Ensures a value is empty. |
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31 | * |
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32 | * @param string $val The input data to validate. |
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33 | * @return bool true if form is not empty, false otherwise. |
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34 | */ |
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35 | function notEmpty($val) |
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36 | { |
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37 | return '' != trim((string)$val); |
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38 | } |
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39 | |
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40 | /** |
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41 | * Ensures a value is blank. |
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42 | * |
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43 | * @param string $val The input data to validate. |
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44 | * @return bool true if form is empty, false otherwise. |
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45 | */ |
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46 | function isEmpty($val) |
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47 | { |
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48 | return '' == trim((string)$val); |
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49 | } |
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50 | |
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51 | /** |
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52 | * Check whether input is a string. |
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53 | * |
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54 | * @param string $val The input data to validate. |
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55 | * @return bool true if form is a string, false otherwise. |
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56 | */ |
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57 | function isString($val) |
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58 | { |
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59 | return '' == trim((string)$val) || is_string($val); |
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60 | } |
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61 | |
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62 | /** |
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63 | * Check whether input is a number. Allows negative numbers. |
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64 | * |
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65 | * @param string $val The input data to validate. |
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66 | * @return bool True if no errors found, false otherwise. |
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67 | */ |
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68 | function isNumber($val) |
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69 | { |
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70 | return '' == trim((string)$val) || is_numeric($val); |
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71 | } |
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72 | |
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73 | /** |
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74 | * addError if input is NOT an integer. Don't just use is_int() because the |
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75 | * data coming from the user is *really* a string. |
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76 | * |
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77 | * @param string $val The input data to validate. |
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78 | * @return bool true if value is an integer |
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79 | */ |
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80 | function isInteger($val, $negative_ok=false) |
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81 | { |
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82 | $pattern = $negative_ok ? '/^-?[[:digit:]]+$/' : '/^[[:digit:]]+$/'; |
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83 | return '' == trim((string)$val) || (is_numeric($val) && preg_match($pattern, $val)); |
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84 | } |
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85 | |
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86 | /** |
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87 | * Check whether input is a float. Don't just use is_float() because the |
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88 | * data coming from the user is *really* a string. Integers will also |
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89 | * pass this test. |
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90 | * |
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91 | * @param string $val The input data to validate. |
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92 | * @return bool true if value is a float |
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93 | */ |
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94 | function isFloat($val, $negative_ok=false) |
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95 | { |
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96 | $pattern = $negative_ok ? '/^-?[[:digit:]]*(?:\.?[[:digit:]]+)$/' : '/^[[:digit:]]*(?:\.?[[:digit:]]+)$/'; |
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97 | return '' == trim((string)$val) || (is_numeric($val) && preg_match($pattern, $val)); |
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98 | } |
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99 | |
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100 | /** |
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101 | * Check whether input is an array. |
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102 | * |
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103 | * @param string $val The input data to validate. |
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104 | * @return bool true if value is a float |
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105 | */ |
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106 | function isArray($val) |
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107 | { |
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108 | return (is_string($val) && '' == trim((string)$val)) || is_array($val); |
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109 | } |
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110 | |
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111 | /** |
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112 | * Check whether input matches the specified perl regular expression |
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113 | * pattern. |
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114 | * |
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115 | * @param string $val The input data to validate. |
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116 | * @param int $regex PREG that the string must match |
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117 | * @param bool $valid_on_match Set to false to be valid if match, or true |
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118 | * to be valid on no match |
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119 | * @return bool true if value passes regex test |
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120 | */ |
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121 | function checkRegex($val, $regex, $valid_on_match=true) |
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122 | { |
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123 | return $valid_on_match ? preg_match($regex, $val) : !preg_match($regex, $val); |
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124 | } |
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125 | |
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126 | /** |
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127 | * Tests if the string length is between specified values. Whitespace excluded for min. |
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128 | * |
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129 | * @param string $val The input data to validate. |
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130 | * @param int $min minimum length of string, inclusive |
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131 | * @param int $max maximum length of string, inclusive |
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132 | * @return bool true if string length is within given boundaries |
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133 | */ |
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134 | function stringLength($val, $min, $max) |
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135 | { |
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136 | return mb_strlen(trim((string)$val)) >= $min && mb_strlen($val) <= $max; |
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137 | } |
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138 | |
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139 | /** |
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140 | * Check whether input is within a valid numeric range. |
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141 | * |
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142 | * @param string $val The input data to validate. |
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143 | * @param int $min minimum value of number, inclusive |
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144 | * @param int $max maximum value of number, inclusive |
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145 | * @return bool True if no errors found, false otherwise. |
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146 | */ |
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147 | function numericRange($val, $min, $max) |
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148 | { |
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149 | return '' == trim((string)$val) || (is_numeric($val) && $val >= $min && $val <= $max); |
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150 | } |
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151 | |
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152 | /** |
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153 | * Validates an email address based on the recommendations in RFC 3696. |
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154 | * Is more loose than restrictive, to allow the many valid variants of |
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155 | * email addresses while catching the most common mistakes. |
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156 | * http://www.faqs.org/rfcs/rfc822.html |
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157 | * http://www.faqs.org/rfcs/rfc2822.html |
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158 | * http://www.faqs.org/rfcs/rfc3696.html |
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159 | * http://www.faqs.org/rfcs/rfc1035.html |
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160 | * |
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161 | * @access public |
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162 | * @param string $val The input data to validate.. |
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163 | * @return bool Validity of address. |
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164 | * @author Quinn Comendant <quinn@strangecode.com> |
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165 | */ |
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166 | function validateEmail($val) |
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167 | { |
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168 | require_once 'codebase/lib/Email.inc.php'; |
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169 | $e = new Email(); |
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170 | |
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171 | // Test email address format. |
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172 | if (!preg_match($e->getParam('regex'), $val, $e_parts)) { |
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173 | return VALIDATE_EMAIL_REGEX_FAIL; |
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174 | } |
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175 | |
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176 | // We have a match! Here are the captured subpatterns, on which further tests are run. |
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177 | // The part before the @. |
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178 | $local = $e_parts[2]; |
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179 | |
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180 | // The part after the @. |
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181 | // If domain is an IP [XXX.XXX.XXX.XXX] strip off the brackets. |
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182 | $domain = $e_parts[3]{0} == '[' ? mb_substr($e_parts[3], 1, -1) : $e_parts[3]; |
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183 | |
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184 | // Test length. |
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185 | if (mb_strlen($local) > 64 || mb_strlen($domain) > 191) { |
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186 | return VALIDATE_EMAIL_LENGTH_FAIL; |
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187 | } |
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188 | |
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189 | // Check domain exists: It's a domain if ip2long fails; Checkdnsrr ensures a MX record exists; Gethostbyname() ensures the domain exists. |
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190 | // Compare ip2long twice for php4 backwards compat. |
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191 | if ((ip2long($domain) == '-1' || ip2long($domain) === false) && function_exists('checkdnsrr') && !checkdnsrr($domain . '.', 'MX') && gethostbyname($domain) == $domain) { |
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192 | return VALIDATE_EMAIL_MX_FAIL; |
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193 | } |
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194 | |
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195 | return VALIDATE_EMAIL_SUCCESS; |
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196 | } |
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197 | |
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198 | /** |
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199 | * Verifies that date can be processed by the strtotime function. |
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200 | * |
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201 | * @param string $val The input data to validate. |
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202 | * @return bool True if no errors found, false otherwise. |
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203 | */ |
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204 | function validateStrDate($val) |
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205 | { |
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206 | $app =& App::getInstance(); |
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207 | |
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208 | if ('' == trim($val)) { |
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209 | // Don't be too bothered about empty strings. |
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210 | return true; |
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211 | } |
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212 | |
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213 | $timestamp = strtotime($val); |
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214 | // Return values change between php4 and php5. |
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215 | if ('' != trim($val) && ($timestamp === -1 || $timestamp === false)) { |
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216 | return false; |
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217 | } else { |
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218 | return true; |
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219 | } |
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220 | } |
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221 | |
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222 | |
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223 | /** |
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224 | * Verifies credit card number using the Luhn (mod 10) algorithm. |
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225 | * http://en.wikipedia.org/wiki/Luhn_algorithm |
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226 | * |
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227 | * @param string $val The input data to validate.. |
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228 | * @param string $cc_num Card number to verify. |
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229 | * @param string $cc_type Optional, card type to do specific checks. |
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230 | * @return bool True if no errors found, false otherwise. |
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231 | */ |
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232 | function validateCCNumber($val, $cc_type=null) |
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233 | { |
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234 | // Get rid of any non-digits |
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235 | $cc_num = preg_replace('/[^\d]/', '', $val); |
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236 | |
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237 | // Perform card-specific checks, if applicable |
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238 | switch ($cc_type) { |
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239 | case CC_TYPE_VISA : |
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240 | $regex = '/^4\d{15}$|^4\d{12}$/'; |
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241 | break; |
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242 | case CC_TYPE_MASTERCARD : |
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243 | $regex = '/^5[1-5]\d{14}$/'; |
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244 | break; |
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245 | case CC_TYPE_AMEX : |
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246 | $regex = '/^3[47]\d{13}$/'; |
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247 | break; |
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248 | case CC_TYPE_DISCOVER : |
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249 | $regex = '/^6011\d{12}$/'; |
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250 | break; |
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251 | case CC_TYPE_DINERS : |
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252 | $regex = '/^30[0-5]\d{11}$|^3[68]\d{12}$/'; |
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253 | break; |
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254 | case CC_TYPE_JCB : |
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255 | $regex = '/^3\d{15}$|^2131|1800\d{11}$/'; |
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256 | break; |
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257 | default : |
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258 | $regex = ''; |
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259 | break; |
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260 | } |
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261 | |
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262 | if ('' != $regex && !preg_match($regex, $cc_num)) { |
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263 | // Invalid format. |
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264 | return false; |
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265 | } |
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266 | |
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267 | // The Luhn formula works right to left, so reverse the number. |
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268 | $cc_num = strrev($cc_num); |
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269 | |
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270 | $luhn_total = 0; |
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271 | |
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272 | $num = mb_strlen($cc_num); |
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273 | for ($i=0; $i<$num; $i++) { |
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274 | // Get each digit. |
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275 | $digit = mb_substr($cc_num, $i, 1); |
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276 | |
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277 | // If it's an odd digit, double it. |
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278 | if ($i / 2 != floor($i / 2)) { |
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279 | $digit *= 2; |
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280 | } |
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281 | |
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282 | // If the result is two digits, add them. |
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283 | if (mb_strlen($digit) == 2) { |
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284 | $digit = mb_substr($digit, 0, 1) + mb_substr($digit, 1, 1); |
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285 | } |
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286 | |
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287 | // Add the current digit to the $luhn_total. |
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288 | $luhn_total += $digit; |
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289 | } |
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290 | |
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291 | // If the Total is evenly divisible by 10, it's cool! |
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292 | return $luhn_total % 10 == 0; |
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293 | } |
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294 | |
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295 | /** |
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296 | * Check whether a file was selected for uploading. If file is missing, it's an error. |
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297 | * |
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298 | * @param string $form_name The input data to validate. |
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299 | * @return bool True if no errors found, false otherwise. |
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300 | */ |
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301 | function fileUploaded($form_name) |
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302 | { |
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303 | if (!isset($_FILES[$form_name]['name']) || empty($_FILES[$form_name]['name'])) { |
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304 | return false; |
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305 | } |
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306 | |
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307 | if (is_array($_FILES[$form_name]['name'])) { |
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308 | foreach($_FILES[$form_name]['name'] as $f) { |
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309 | if ('' == $f) { |
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310 | return false; |
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311 | } |
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312 | } |
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313 | } else { |
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314 | if ('' == $_FILES[$form_name]['name']) { |
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315 | return false; |
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316 | } |
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317 | } |
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318 | |
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319 | return true; |
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320 | } |
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321 | |
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322 | } // THE END |
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323 | |
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324 | ?> |
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