How to replace src in php

php替换src的方法：可以利用preg_replace函数并结合正则表达式来实现替换，如【preg_replace($pregRule, '

可以使用正则表达式批量替换Img中src内容。

函数介绍：

preg_replace 函数执行一个正则表达式的搜索和替换。

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实现代码：

/**
* 图片地址替换成压缩URL
* @param string $content 内容
* @param string $suffix 后缀
*/
function get_img_thumb_url($content="",$suffix="!c550x260.jpg")
{
$pregRule = "/<[img|IMG].*?src=[\&#39;|\"](.*?(?:[\.jpg|\.jpeg|\.png|\.gif|\.bmp]))[\&#39;|\"].*?[\/]?>/";
$content = preg_replace($pregRule, &#39;<img  src="/static/imghwm/default1.png"  data-src="${1}&#39;.$suffix.&#39;"  class="lazy"     style="max-width:90%" alt="How to replace src in php" >&#39;, $content);
return $content;
}

实际代码：

$content = &#39;<a href="#"><img  class="center lazy"  src="/static/imghwm/default1.png"  data-src="https://xxx.com/styles/images/default.jpg"    alt="How to replace src in php" ></a>&#39;
.&#39;<p><img  class="center lazy"  src="/static/imghwm/default1.png"  data-src="https://img.xxx.com/images/219_Ig5eZI.jpg"      style="max-width:90%" alt="How to replace src in php" ></p>&#39;;
$newct = get_img_thumb_url($content);
print_r($newct);

输出结果：

<a href="#"><img  src="/static/imghwm/default1.png"  data-src="https://xxx.com/styles/images/default.jpg!c550x260.jpg"  class="lazy"     style="max-width:90%" alt="How to replace src in php" ></a><p><img  src="/static/imghwm/default1.png"  data-src="https://img.xxx.com/images/219_Ig5eZI.jpg!c550x260.jpg"  class="lazy"     style="max-width:90%" alt="How to replace src in php" ></p>

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