Achieves proportional compression of image size based on PHP,

Achieves proportional compression of image size based on PHP,

If you don't talk much about it, just paste the php code to compress the image size. The specific code is as follows:

<?php$im = imagecreatefromjpeg('D:\phpplace\.jpeg');resizeImage($im,,,'xinde','.jpg');function resizeImage($im,$maxwidth,$maxheight,$name,$filetype){$pic_width = imagesx($im);$pic_height = imagesy($im);echo "start-----------------" ;if(($maxwidth && $pic_width > $maxwidth) && ($maxheight && $pic_height > $maxheight)){if($maxwidth && $pic_width>$maxwidth){$widthratio = $maxwidth/$pic_width;$resizewidth_tag = true;}if($maxheight && $pic_height>$maxheight){$heightratio = $maxheight/$pic_height;$resizeheight_tag = true;}if($resizewidth_tag && $resizeheight_tag){if($widthratio<$heightratio)$ratio = $widthratio;else$ratio = $heightratio;}if($resizewidth_tag && !$resizeheight_tag)$ratio = $widthratio;if($resizeheight_tag && !$resizewidth_tag)$ratio = $heightratio;$newwidth = $pic_width * $ratio;$newheight = $pic_height * $ratio;if(function_exists("imagecopyresampled")){$newim = imagecreatetruecolor($newwidth,$newheight);imagecopyresampled($newim,$im,,,,,$newwidth,$newheight,$pic_width,$pic_height);}else{$newim = imagecreate($newwidth,$newheight);imagecopyresized($newim,$im,,,,,$newwidth,$newheight,$pic_width,$pic_height);}$name = $name.$filetype;imagejpeg($newim,$name);imagedestroy($newim);}else{$name = $name.$filetype;imagejpeg($im,$name);} } 

The above code content is related to PHP-based implementation of proportional compression of image size. The code is easy to understand and cannot be written properly. Thank you for your valuable comments, xiaobian is very happy.

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