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<?php var_dump(mb_substr('HelloI am a string', 6, NULL, 'UTF-8')); var_dump(mb_substr('HelloI am a string', 6, NULL)); var_dump(mb_substr('HelloI am a string', 6));
Output for git.master, git.master_jit, rfc.property-hooks
string(12) " am a string" string(12) " am a string" string(12) " am a string"

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