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<?php $source = '&#x21;'; $source = preg_replace_callback( '/&#x([a-f0-9]+);/mi', function ($m) { return chr(hexdec($m[1])); }, // Now a Closure $source ); var_dump($source);
Output for rfc.property-hooks, git.master, git.master_jit
string(1) "!"

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