Graphics
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<?
/* Author: Johan Hultgren */
/* E-mail: johan@6thgear.se */
/* Copyright: ...nah */
class ImgUtil {
var $max_height;
var $max_width;
var $thePath;
/* Path can be set in the constructor */
function ImgUtil($str = NULL) {
if($str != NULL) $this->thePath = $str;
else $this->thePath = NULL;
}
/* ...otherwise use this method */
function set_path($path) {
$this->thePath = $path;
}
/* Retrive path from object if set */
function get_path() {
if($this->thePath == NULL)
return "No path set.";
else
return $this->thePath;
}
/* Get formated info regarding the image. Usage: */
/* img_info((string) str) */
/* str = "w" returns image width */
/* str = "h" returns image height */
/* str = "s" returns image formated file size(byte, kb, Mb) */
/* str = "t" returns image type (GIF, JPEG, PNG, SWF) */
/* str = "w x w" returns width x height */
/* etc... */
function img_info($str) {
if(!$str) return "Specify return string: 't', 'w', 'h', 'w x h', etc.";
else
if($this->thePath < " ") return "No path set.";
else {
if($imgArr = getimagesize($this->thePath)) {
switch($imgArr[2]) {
case 1:
$type = "GIF";
break;
case 2:
$type = "JPEG";
break;
case 3:
$type = "PNG";
break;
case 4:
$type = "SWF";
break;
}
$size = filesize($this->thePath);
if ($size > 1000000) {
$size = $size/1000000;
$size = $size." Mb";
} else if ($size > 1000) {
$size = $size/1000;
$size = $size." Kb";
} else
$size = $size." byte";
$w = $imgArr[0];
$h = $imgArr[1];
$t = $type;
$s = $size;
$str = str_replace("w", $w, $str);
$str = str_replace("h", $h, $str);
$str = str_replace("t", $t, $str);
$str = str_replace("s", $s, $str);
return $str;
}
else return "No image file.";
}
}
/* Method to set maximum image preview size */
function set_max_preview_size($width, $height) {
$this->max_width = $width;
$this->max_height = $height;
}
/* Image preview method. Variables max_width, max_height and thePath must */
/* be set */
function img_preview() {
if($this->max_width == NULL || $this->max_height == NULL)
return "Variables max_width and max_height has to be set.";
else if($this->thePath < " ") echo "Path has to be set.";
else {
if($imgArr = getimagesize($this->thePath)) {
if($imgArr[0] > $imgArr[1]) {
if($imgArr[0] <= $this->max_width)
return '<img src="'.$this->thePath.'" '.$imgArr[3].'>';
else return '<img src="'.$this->thePath.'"width="'.$this->max_width.'" height="'.($this->max_width/$imgArr[0])*$imgArr[1].'">';
}
else if($imgArr[0] < $imgArr[1]) {
if($imgArr[1] <= $max_height)
return '<img src="'.$this->thePath.'" '.$imgArr[3].'>';
else return '<img src="'.$this->thePath.'"height="'.$this->$max_height.'" width="'.($this->max_height/$imgArr[1])*$imgArr[0].'">';
}
else
return '<img src="'.$this->thePath.'" '.$imgArr[3].'>';
}
}
}
}
?>
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Usage Example
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<?
require("./classes/ImgUtil.class"); // relative classpath
// In this case set the directory you wish to list
$path = "./images/";
// Create an empty ImgUtil object
$img = new ImgUtil();
// Setting maximum preview size:
$img->set_max_preview_size("200","150"); // width, height
// If file chosen, set its path
if(isset($img_chosen)) $img->set_path($img_chosen);
// If erase button is clicked, unlink the file
if(isset($img_chosen) && isset($erase)) {
if(unlink("".$img->get_path()))
echo '<div align="center" class="arial_11_normal_svart"><font color="#CC0000">Image <b>'.basename($img_chosen).'</b> erased.</font></div>';
$img_chosen = NULL;
}
?>
<html>
<body>
<table width="564" height="100" cellpadding="0" cellspacing="0">
<tr>
<form name="file_form" action="<? echo $PHP_SELF; ?>" method="post">
<td width="227" valign="top">
<b>Administrate images.</b><br><br>
Choose the imge you want to erase or get information for.<br><br>
<select name="img_chosen" onchange="javaScript:document.file_form.submit();">
<option disabled>Choose image here</option>
<?
// File chooser, got to have a file for the example =)
$handle = opendir($path);
while ($file = readdir($handle)) {
if ($file != "." && $file != "..") {
if (is_dir($file) == FALSE && is_link($file) == FALSE) {
if (basename($img_chosen) == $file)
echo '<option value="'$path.$file.'" selected>'.$file.'</option>';
else
echo '<option value="'$path.$file.'">'.$file.'</option>';
}
}
}
closedir($handle);
?>
</select><br><br>
<?
// Displaying some info regarding the chosen image
if (isset($img_chosen)) {
echo 'Filename: <b>'.basename($img_chosen).'</b><br>';
// Derives info from object using its img_info method
echo 'File size (bytes): '.$img->img_info("s").'<br>';
echo 'Image type: '.$img->img_info("t").'<br>';
echo 'Dimensions (w x h): '.$img->img_info("w x h").'<br>';
}
?>
</td>
<td width="20">
</td>
<td width="227" valign="bottom">
<?
if (isset($img_chosen)) {
echo 'Preview.<br><table bgcolor="#cc0000" cellpadding="1" cellspacing="0"><tr><td>
<table width="227" height="150" bgcolor="#CCCCCC"><tr><td align="center" valign="middle">
'
// Previewing image using the objects img_preview method
.$img->img_preview().
'
</td></tr></table></td></tr></table><br><br>
<input type="submit" name="erase" value="erase image">';
}
?>
</td>
</form>
</tr>
</table>
</body>
</html>
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