仅匹配regex-PHP中的前两个事件
我正在尝试用链接替换文本。我现在拥有的正则表达式将替换所有匹配项,但我只想替换前两个匹配项 它应该用链接替换所有出现的仅匹配regex-PHP中的前两个事件,php,regex,Php,Regex,我正在尝试用链接替换文本。我现在拥有的正则表达式将替换所有匹配项,但我只想替换前两个匹配项 它应该用链接替换所有出现的find me,除非它位于或标记中 我现在的正则表达式: /<(a|h[1-6])[^>]*>(?:[a-zA-Z0-9\s\'\-\.,]|(?:<(.*)>.*<\/\1>))*<\/(a|h[1-6])>(*SKIP)(*FAIL)|\b(Find Me)\b(?=[^>]*(?:<|$))/ig /]
find me
,除非它位于或标记中
我现在的正则表达式:
/<(a|h[1-6])[^>]*>(?:[a-zA-Z0-9\s\'\-\.,]|(?:<(.*)>.*<\/\1>))*<\/(a|h[1-6])>(*SKIP)(*FAIL)|\b(Find Me)\b(?=[^>]*(?:<|$))/ig
/]*>(?:[a-zA-Z0-9\s\'-\,]|(?:*)*(*跳过)(*失败)|\b(找到我)\b(?=[^>]*(?:使用未知的$limit
参数修复了它
$text=preg\u replace($regex,sprintf(“”,'http://example.com“),$text,$limit=2);
Lorem ipsum find me and skip when
<b>find me</b> is inside a link tag
like this find me
<h1>find me in the title</h1>
<a href="#">here you can find me too</a>.
<h2 class="heading">Lorem Ipsum dolor find me here too</h2>
<table>
<tr><td>Cell 1 a</td><td>Find me</td></tr>
<tr><td>Cell 2 with find me</td><td><a href="#foo">Find me</a></td></tr>
</table>
<h3 class="heading">Duomo Di find me San Martino</h3>
<p>FIND ME as well</p>
$text = 'Lorem ipsum find me and skip when
<b>find me</b> is inside a link tag
like this find me
<h1>find me in the title</h1>
<a href="#">here you can find me too</a>.
<h2 class="heading">Lorem Ipsum dolor find me here too</h2>
<table>
<tr><td>Cell 1 a</td><td>Find me</td></tr>
<tr><td>Cell 2 with find me</td><td><a href="#foo">Find me</a></td></tr>
</table>
<h3 class="heading">Duomo Di find me San Martino</h3>
<p>FIND ME as well</p>';
$regex = "/<(a|h[1-6])[^>]*>(?:[a-zA-Z0-9\s\'\-\.,]|(?:<(.*)>.*<\/\1>))*<\/(a|h[1-6])>(*SKIP)(*FAIL)|\b(" . preg_quote('find me') . ")\b(?=[^>]*(?:<|$))/i";
$text = preg_replace($regex, sprintf('<a href="%s">$4</a>', 'http://example.com'), $text);