Customizable PHP thumbnail generation program (requires GD library support) _php instance

Classic PHP thumbnail generation program, based on the GD library, you can specify the build path and build the goal of the wide and high detail use: In the PHP environment that supports the GD library, the following code is saved as resize.php test


The classic PHP thumbnail generation program, based on the GD library, can specify the build path and build target of the wide-high details

Usage: In a PHP environment that supports the GD library, save the following code as a resize.php test

Copy Code code as follows:

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$FILENAME = "Image_name";

Build the width of the picture
$RESIZEWIDTH = 400;

Height of the build picture
$RESIZEHEIGHT = 400;

Path to build a picture
$uploaddir = "C:/winnt/temp";

function Resizeimage ($im, $maxwidth, $maxheight, $name) {
Global $uploaddir;
$width = Imagesx ($im);
$height = Imagesy ($im);
if ($maxwidth && $width > $maxwidth) | | ($maxheight && $height > $maxheight)) {
if ($maxwidth && $width > $maxwidth) {
$widthratio = $maxwidth/$width;
$RESIZEWIDTH =true;
}
if ($maxheight && $height > $maxheight) {
$heightratio = $maxheight/$height;
$RESIZEHEIGHT =true;
}
if ($RESIZEWIDTH && $RESIZEHEIGHT) {
if ($widthratio < $heightratio) {
$ratio = $widthratio;
}else{
$ratio = $heightratio;
}
}elseif ($RESIZEWIDTH) {
$ratio = $widthratio;
}elseif ($RESIZEHEIGHT) {
$ratio = $heightratio;
}
$newwidth = $width * $ratio;
$newheight = $height * $ratio;
if (function_exists ("imagecopyresampled")) {
$newim = Imagecreatetruecolor ($newwidth, $newheight);
Imagecopyresampled ($newim, $im, 0, 0, 0, 0, $newwidth, $newheight, $width, $height);
}else{
$newim = Imagecreate ($newwidth, $newheight);
Imagecopyresized ($newim, $im, 0, 0, 0, 0, $newwidth, $newheight, $width, $height);
}
Imagejpeg ($newim, $uploaddir. $name. ". jpg");
Imagedestroy ($newim);
}else{
Imagejpeg ($im, $uploaddir. $name. ". jpg");
}
}



if ($_files[' image '] [' size ']) {
if ($_files[' image '] [' type '] = = "Image/pjpeg") {
$im = imagecreatefromjpeg ($_files[' image '] [' tmp_name ']);
}elseif ($_files[' image '] [' type '] = = "Image/x-png") {
$im = imagecreatefrompng ($_files[' image '] [' tmp_name ']);
}elseif ($_files[' image '] [' type '] = = "Image/gif") {
$im = imagecreatefromgif ($_files[' image '] [' tmp_name ']);
}
if ($im) {
if (File_exists ("$FILENAME. jpg")) {
Unlink ("$FILENAME. jpg");
}
Resizeimage ($im, $RESIZEWIDTH, $RESIZEHEIGHT, $FILENAME);
Imagedestroy ($im);
}
}
?>

<br><br>

<form enctype= "Multipart/form-data" method= "POST" >
<br>
<input type= "file" name= "image" Size= "a" value= "browse" ><p>
<input type= "Submit" value= "Upload picture" >
</form>

</body>