Implementing equal-ratio compression of image size based on PHP, _PHP tutorial

Based on PHP to achieve equal compression of image size,

Without further ado, I will directly post the relevant code of PHP equal compression of image size. The specific code is as follows :

<&#63;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 the implementation of equal-ratio compression of image size based on PHP introduced by the editor. The code is simple and easy to understand. If there is anything wrong with it, you are welcome to give your valuable opinions. The editor is very happy.

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http://www.bkjia.com/PHPjc/1106112.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/1106112.htmlTechArticle Based on PHP to achieve equal-ratio compression of image size. Without further ado, I will directly post PHP equal-ratio compressed images to everyone. The relevant code for size is as follows: php$im = imagecreatefr...