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How to replace image address in php

王林
Release: 2023-03-03 14:46:01
Original
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php替换图片地址的方法:可以通过正则表达式实现替换,使用方法如:【preg_match('/<\s*img\s+[^>]*?src\s*=\s*(\'|\")(.*?)\\1[^>]*?\/?\s*>/i',$str,$match);】。

How to replace image address in php

preg_match 函数用于执行一个正则表达式匹配。

(推荐教程:php图文教程

函数语法:

int preg_match (string $pattern, string $subject[, array &$matches[, int $flags = 0[, int $offset = 0 ]]])
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返回 pattern 的匹配次数。 它的值将是 0 次(不匹配)或 1 次,因为 preg_match() 在第一次匹配后 将会停止搜索。

(学习视频推荐:php视频教程

代码实现:

<?php

/*PHP正则提取图片img标记中的任意属性*/
$str = &#39;<center><img src="/uploads/images/20100516000.jpg" height="120" width="120"><br />PHP正则提取或更改图片img标记中的任意属性</center>&#39;;

//1、取整个图片代码
preg_match(&#39;/<\s*img\s+[^>]*?src\s*=\s*(\&#39;|\")(.*?)\\1[^>]*?\/?\s*>/i&#39;,$str,$match);
echo $match[0];

//2、取width
preg_match(&#39;/<img.+(width=\"?\d*\"?).+>/i&#39;,$str,$match);
echo $match[1];

//3、取height
preg_match(&#39;/<img.+(height=\"?\d*\"?).+>/i&#39;,$str,$match);
echo $match[1];

//4、取src
preg_match(&#39;/<img.+src=\"?(.+\.(jpg|gif|bmp|bnp|png))\"?.+>/i&#39;,$str,$match);
echo $match[1];

/*PHP正则替换图片img标记中的任意属性*/
//1、将src="/uploads/images/20100516000.jpg"替换为src="/uploads/uc/images/20100516000.jpg")
print preg_replace(&#39;/(<img.+src=\"?.+)(images\/)(.+\.(jpg|gif|bmp|bnp|png)\"?.+>)/i&#39;,"\${1}uc/images/\${3}",$str);
echo "<hr/>";

//2、将src="/uploads/images/20100516000.jpg"替换为src="/uploads/uc/images/20100516000.jpg",并省去宽和高
print preg_replace(&#39;/(<img).+(src=\"?.+)images\/(.+\.(jpg|gif|bmp|bnp|png)\"?).+>/i&#39;,"\${1} \${2}uc/images/\${3}>",$str);

?>
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