[95] | 1 | <?php |
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| 2 | /** |
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| 3 | * Image.inc.php |
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[135] | 4 | * code by strangecode :: www.strangecode.com :: this document contains copyrighted information |
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| 5 | * |
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[95] | 6 | * @author Quinn Comendant <quinn@strangecode.com> |
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| 7 | * @version 1.1 |
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| 8 | * @since 14 Apr 2006 20:07:29 |
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| 9 | */ |
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| 10 | class Image { |
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| 11 | |
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| 12 | // Object parameters. |
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| 13 | var $_params = array(); |
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| 14 | |
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| 15 | /** |
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| 16 | * Constructor. |
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| 17 | * |
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| 18 | * @param array $params Set parameters for this object. |
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| 19 | * @author Quinn Comendant <quinn@strangecode.com> |
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| 20 | * @version 1.1 |
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| 21 | * @since 26 Jan 2005 01:54:50 |
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| 22 | */ |
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| 23 | function Image($params=array()) |
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| 24 | { |
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| 25 | if (!is_array($params)) { |
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| 26 | trigger_error(sprintf('Parameters not specified properly.', null), E_USER_ERROR); |
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| 27 | } |
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| 28 | $defaults = array( |
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| 29 | // Pattern passed to glob() with $id to match image filenames. |
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| 30 | 'filename_pattern' => '%s*', |
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| 31 | |
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| 32 | // The path to the image source directory. (Ex: /var/www/htdocs/images) |
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| 33 | 'base_path' => '', |
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| 34 | |
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| 35 | // The URL to the image directory. (Ex: /images) |
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| 36 | 'base_url' => '', |
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| 37 | |
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| 38 | // Image to use in the case of a missing image. |
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| 39 | 'default_image_file' => '', |
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| 40 | ); |
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| 41 | $this->_params = array_merge($defaults, $params); |
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| 42 | } |
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| 43 | |
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| 44 | /** |
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| 45 | * Tests if an image with specified id exists on the file system. |
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| 46 | * |
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| 47 | * @access public |
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| 48 | * @param string $id Unique image identifier. |
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| 49 | * @return bool Existence of file. |
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| 50 | * @author Quinn Comendant <quinn@strangecode.com> |
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| 51 | * @version 1.0 |
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| 52 | * @since 26 Jan 2005 01:54:50 |
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| 53 | */ |
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| 54 | function exists($id) |
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| 55 | { |
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| 56 | $src = $this->oSrc($id); |
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| 57 | $filepath = preg_match('!://!', $src) ? $src : getenv('DOCUMENT_ROOT') . $src; |
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[121] | 58 | // Use exif_imagetype to check not only file existance but that of a valid image. |
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[95] | 59 | return false != @exif_imagetype($filepath); |
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| 60 | } |
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| 61 | |
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| 62 | /** |
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| 63 | * Returns the value from getimagesize(). |
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| 64 | * |
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| 65 | * @access public |
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| 66 | * @param string $id Unique image identifier. |
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| 67 | * @param int $key Which element from the array returned by getimagesize: |
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| 68 | * - Index 0 contains the width of the image in pixels. |
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| 69 | * - Index 1 contains the height. |
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| 70 | * - Index 2 is the type of the image. |
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| 71 | * - Index 3 is height="yyy" width="xxx" string. |
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| 72 | * @return mixed return value of getimagesize. |
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| 73 | * @author Quinn Comendant <quinn@strangecode.com> |
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| 74 | * @version 1.0 |
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| 75 | * @since 26 Jan 2005 01:54:50 |
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| 76 | */ |
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| 77 | function size($id, $key) |
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| 78 | { |
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| 79 | $src = $this->oSrc($id); |
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| 80 | $filepath = preg_match('!://!', $src) ? $src : getenv('DOCUMENT_ROOT') . $src; |
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| 81 | $img_size = @getimagesize($filepath); |
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| 82 | return isset($img_size[$key]) ? $img_size[$key] : false; |
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| 83 | } |
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| 84 | |
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| 85 | /** |
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| 86 | * Returns the URL to the source of image specified by id. |
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| 87 | * |
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| 88 | * @access public |
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| 89 | * @param string $id Unique image identifier. |
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| 90 | * @return string Absolute URL of image. |
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| 91 | * @author Quinn Comendant <quinn@strangecode.com> |
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| 92 | * @version 1.1 |
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| 93 | * @since 26 Jan 2005 01:56:35 |
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| 94 | */ |
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| 95 | function oSrc($id) |
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| 96 | { |
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| 97 | $file_name = ''; |
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[121] | 98 | // filename_pattern is a sprintf argument with %s replaced with the image id. |
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[95] | 99 | if ($file_match = glob(sprintf("%s/{$this->_params['filename_pattern']}", $this->_params['base_path'], $id))) { |
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| 100 | $file_name = basename(end($file_match)); |
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| 101 | } else if ('' != $this->_params['default_image_file']) { |
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| 102 | $file_name = $this->_params['default_image_file']; |
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| 103 | } |
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| 104 | return sprintf('%s/%s', $this->_params['base_url'], $file_name); |
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| 105 | } |
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| 106 | |
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| 107 | /** |
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| 108 | * Returns an HTML <img> tag with the src set to an image specified by id. |
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| 109 | * Automatically prints image width and height. |
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| 110 | * |
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| 111 | * @access public |
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| 112 | * @param string $id Unique image identifier. |
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| 113 | * @param string $alt Text for image alt attribute. |
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| 114 | * @param string $extra Additional tag attributes. |
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| 115 | * @return HTML image tag. |
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| 116 | * @author Quinn Comendant <quinn@strangecode.com> |
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| 117 | * @version 1.0 |
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| 118 | * @since 26 Jan 2005 01:57:33 |
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| 119 | */ |
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| 120 | function oImg($id, $alt='', $extra='') |
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| 121 | { |
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| 122 | $src = $this->oSrc($id); |
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| 123 | $filepath = preg_match('!://!', $src) ? $src : getenv('DOCUMENT_ROOT') . $src; |
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| 124 | |
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| 125 | if (false === ($gis = @getimagesize($filepath)) || preg_match('/width|height/', $extra)) { |
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| 126 | $image_size = ''; |
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| 127 | } else { |
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| 128 | $image_size = $gis[3]; |
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| 129 | } |
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| 130 | |
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| 131 | return sprintf('<img src="%s" %s alt="%s" %s />', |
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| 132 | $src, |
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| 133 | $image_size, |
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| 134 | oTxt($alt), |
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| 135 | $extra |
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| 136 | ); |
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| 137 | } |
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| 138 | } // End class |
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| 139 | |
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| 140 | ?> |
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