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Home Backend Development PHP Tutorial 求替换全局img图片的正则表达式

求替换全局img图片的正则表达式

Jun 23, 2016 pm 01:54 PM
img overall situation picture replace regular expression

如题
现在有一字符串是

$content = '

求替换全局img图片的正则表达式求替换全局img图片的正则表达式test

';

想要将这字符里面的 images/tmp 都替换成 images/pub

本人已经写了一个函数
	public static function replace_img_publish_path($content){		$pattern='/(<[img|IMG].+src=\"?.+)(images\/tmp\/)(.+\.(jpg|gif|bmp|bnp|png)\"?.+>)/';		$replacement="\${1}images/pub/\${3}";		print  preg_replace($pattern, $replacement, $content);		exit;	}
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输出结果为

求替换全局img图片的正则表达式求替换全局img图片的正则表达式test



只替换了最后一个img标签

如何才能全部都替换?


回复讨论(解决方案)

$content = '<p><img  src="/static/imghw/default1.png"  data-src="http://localhost:8080/story/images/tmp/1403530150545.jpg"  class="lazy"     style="max-width:90%" alt="求替换全局img图片的正则表达式" ><img  src="/static/imghw/default1.png"  data-src="http://localhost:8080/story/images/tmp/1403530147265.jpg"  class="lazy"     style="max-width:90%" alt="求替换全局img图片的正则表达式" >test</p>';$content = preg_replace('#(?<=src="http://localhost:8080/story/images/)tmp/#', 'pub/', $content);echo $content;
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求替换全局img图片的正则表达式求替换全局img图片的正则表达式test


你没有防止贪婪匹配。

$pattern='/(<[img|IMG].+?src=\"?.+?)(images\/tmp\/)(.+?\.(jpg|gif|bmp|bnp|png)\"?.+?>)/';

你写的方法加一个参数U就可以了。
加上U,将懒惰匹配 变成 贪婪匹配。

$pattern='/(<[img|IMG].+src=\"?.+)(images\/tmp\/)(.+\.(jpg|gif|bmp|bnp|png)\"?.+>)/ U';

测试例子:

$content = '<p><img  src="/static/imghw/default1.png"  data-src="http://localhost:8080/story/images/tmp/1403530150545.jpg"  class="lazy"     style="max-width:90%" alt="求替换全局img图片的正则表达式" ><img  src="/static/imghw/default1.png"  data-src="http://localhost:8080/story/images/tmp/1403530147265.jpg"  class="lazy"     style="max-width:90%" alt="求替换全局img图片的正则表达式" >test</p>';replace_img_publish_path($content);function replace_img_publish_path($content){    $pattern='/(<[img|IMG].+src=\"?.+)(images\/tmp\/)(.+\.(jpg|gif|bmp|bnp|png)\"?.+>)/U';    $replacement="\${1}images/pub/\${3}";    print  preg_replace($pattern, $replacement, $content);    exit;}
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替换后:

求替换全局img图片的正则表达式求替换全局img图片的正则表达式test

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