如何用php  壓縮圖片 廢話不說 直接上程式碼

header("Content-type: image/jpeg");
//獲取圖片路徑
$file = "123.jpg";

$percent = 0.3; //圖片壓縮比

list($width, $height) = getimagesize($file); //獲取原圖尺寸

//縮放尺寸

$newwidth = $width * $percent;


$newheight = $height * $percent;

$src_im = imagecreatefromjpeg($file);

$dst_im = imagecreatetruecolor($newwidth, $newheight);

imagecopyresized($dst_im, $src_im, 0, 0, 0, 0, $newwidth, $newheight, $width, $height);

imagejpeg($dst_im,$file); //輸出壓縮後的圖片

imagedestroy($dst_im);

imagedestroy($src_im);