php批量缩放图片的代码[ini参数控制]
author:一佰互联 2019-04-30   click:165
首先使用一个ini文件来设置要缩放的大小,其中为宽或高0的则为图片放大或缩小,都为0则还是原大小,都不为0都拉抻成指定的大小。

注意:ini文件使用php解释时为注释文件,什么也没有输出,这是为了安全起见而故意为之。而;则是ini文件的注释。

我设置的ini文件例子如下:

复制代码 代码如下:
<?php
/*
;Translate the image format using the original image size
[Translation]
width=0
height=0

;Stretch the image to the specified size
[Stretch]
width=800
height=600

;Zoom the image to the specified Width with height auto size
[AutoHeight]
width=740
height=0

;Zoom the image to the specified Height with width auto size
[AutoWidth]
width=0
height=380
*/
?>

下面是编写的缩放图片的php代码,其中变量classes是一个数组,可以选择任意多个ini文件中指定的设置:
复制代码 代码如下:
<?php
$oimg = "test.jpg";//Original image name
$classes = array("Translation","AutoHeight","AutoWidth","Stretch");//Give classes for the new creating images" size which are defined in the specified ini file
$suffix = "jpg";//The new image"s suffix
$inifile = "image.ini.php";

$size = getimagesize($oimg);
$x = $size[0]/$size[1];
$name = explode(".",$oimg);

if(!file_exists($inifile)) die("Ini file does not exist!");
$cn = parse_ini_file($inifile,true);//Parse the class style image size from ini file
foreach($classes as $class){
foreach($cn as $k=>$v){
if($k==$class){
if($v["width"] && $v["height"]){
$thumbWidth = $v["width"];
$thumbHeight = $v["height"];
}elseif($v["width"]){
$thumbWidth = $v["width"];
$thumbHeight = round($thumbWidth/$x);
}elseif($v["height"]){
$thumbHeight = $v["height"];
$thumbWidth = round($thumbHeight*$x);
}else{
$thumbWidth = $size[0];
$thumbHeight = $size[1];
}
break;
}
}
if(!isset($thumbHeight) && !isset($thumbWidth)) die("Ini file Settings error!");

$nimg = $name[0]."_".$class.".".$suffix;//New image file name
$source = imagecreatefromjpeg($oimg);
$thumb = imagecreatetruecolor($thumbWidth, $thumbHeight);
imagecopyresampled($thumb,$source,0,0,0,0,$thumbWidth,$thumbHeight,$size[0],$size[1]);

if($suffix=="jpg") $method = "imagejpeg";
else $method="image".$suffix;
$method($thumb, $nimg);
imagedestroy($thumb);//Release the image source
imagedestroy($source);
}
?>