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<?php $a = 'abc'; echo "Not passing encoding: "; echo mb_substr($a, 0); echo "\n"; echo "Passing null, and encoding: "; echo mb_substr($a, 0, null, 'utf-8'); echo "\n";
Output for git.master, git.master_jit, rfc.property-hooks
Not passing encoding: abc Passing null, and encoding: abc

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