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<?php $message = 'hello! world. Please visit my site: http://hello.world.com.'; $message = preg_replace('/(?<=^|\s)hello\b/', '<a id="get-ahead-link" style="color: #ffa503;" href="https://somelink.com">hello</a>', $message, -1, $count); echo $message;
Output for git.master, git.master_jit, rfc.property-hooks
<a id="get-ahead-link" style="color: #ffa503;" href="https://somelink.com">hello</a>! world. Please visit my site: http://hello.world.com.

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