PHP批量转换PNG转JPG源码

<?php
/*
$saveDir 保存地址
$file png图片地址

*/
function imageToJpg($saveDir,$file){
$saveDir = str_replace ( "\\", "/", $saveDir );
$srcFile=$saveDir.$file;
$srcFileExt= strtolower ( trim ( substr ( strrchr ( $srcFile, '.' ), 1 ) ) );
if($srcFileExt=='jpeg'||$srcFileExt=='jpg'){
return $saveDir.$file;
}
$srcFileName = basename ( $file ,'.'.$srcFileExt);
$dstFile = $saveDir.$srcFileName.".jpg";
$photoSize = GetImageSize($srcFile);
$pw = $photoSize[0];
$ph = $photoSize[1];
$srcImage = true;
if ( stripos( strtolower($srcFile),".gif") ){
//创建图片
$dstImage = ImageCreateTrueColor( $pw, $ph);
imagecolorallocate($dstImage, 255, 255, 255);
//读取图片
$srcImage = ImageCreateFromGif($srcFile);
//合拼图片
imagecopyresampled($dstImage,$srcImage ,0,0,0,0,$pw,$ph ,$pw,$ph);
//ImageCopyResized($dstImage,$srcImage,0,0,0,0,$pw,$ph,$pw,$ph);
ImageJpeg($dstImage,$dstFile);
imagedestroy($srcImage );
}
if ( stripos( strtolower($srcFile),".png") ){
//创建图片
$dstImage = ImageCreateTrueColor( $pw, $ph);
imagecolorallocate($dstImage, 255, 255, 255);
//读取图片
$srcImage = ImageCreateFromPNG($srcFile);
//合拼图片
imagecopyresampled($dstImage,$srcImage ,0,0,0,0,$pw,$ph ,$pw,$ph);
ImageJpeg($dstImage,$dstFile);
imagedestroy($srcImage );
}
/*if ( $srcImage == false || stripos( strtolower($srcFile),".jpg") ){
$srcImage = ImageCreateFromJPEG($srcFile);
}*/
if(is_file($srcFile)){
@unlink($srcFile);
}
return $saveDir.$srcFileName.".jpg";
}

$snum=0;
$lujingb="*.{png}";
$arr=glob($lujingb,GLOB_BRACE);
if(count($arr)>0){
$j=count($arr);
for($i=0;$i<$j;$i++){
$snum++;
echo $snum."-".$arr[$i]."转换jpg成功<br>";
$saveDir = "";
$file = $arr[$i];
imageToJpg($saveDir,$file);
}
}

?>

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