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<?php define('SITE_URL', 'http://example.com'); $vars = [ 'SITE_URL' => SITE_URL ]; $template = '<p class="card mb-4 shadow-sm"><img src="{{ SITE_URL }}/assets/images/blog/php.png" alt="php" title="php"></p>'; // match any single word with _ or -, with spaces either side or not // e.g: {{key}} or {{ key }} or {{key-foo}} or {{ key-foo }} // not {{ a b c }} $str = preg_replace_callback("/\{\{[ ]{0,}([\w\_-]{1,})[ ]{0,1}\}\}/", function ($match) use ($vars) { return array_key_exists($match[1], $vars) ? $vars[$match[1]] : ''; }, $template); echo $str;
Output for git.master, git.master_jit, rfc.property-hooks
<p class="card mb-4 shadow-sm"><img src="http://example.com/assets/images/blog/php.png" alt="php" title="php"></p>

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