<?php $string = 'wow ABC (R+R) : Weldone boy (My Love)'; //$variable = "ABC (R+R)"; $variable = "ABC \(R\+R\)"; echo $pattern = "/\b$variable(?!\S)/"; echo "\n"; echo preg_match($pattern, $string)? 'matched' : 'not matched'; echo "\n\n"; /* DIRECT FUNCTION */ echo preg_match("/\bABC \(R\+R\)(?!\S)/", 'wow ABC (R+R) : Weldone boy (My Love)')? 'matched' : 'not matched';
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