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<?php $needle = ':Name'; $str = ":Name :Name_en"; echo "Leading word boundary\t\t" . preg_replace("#\b$needle\b#", '"Test"', $str); echo "\n---\n"; echo "No leading word boundary\t" . preg_replace("#$needle\b#", '"Test"', $str); echo "\n---\n"; echo "Leading non-word boundary\t" . preg_replace("#\B$needle\b#", '"Test"', $str);
Output for git.master, git.master_jit, rfc.property-hooks
Leading word boundary :Name :Name_en --- No leading word boundary "Test" :Name_en --- Leading non-word boundary "Test" :Name_en

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