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<?php $words = "systematic,gear,synthesis,mysterious"; $words=explode(",",$words); $your_array = preg_grep("/^(^s|^m|^e)/", $words); print_r($your_array);
Output for rfc.property-hooks, git.master, git.master_jit
Array ( [0] => systematic [2] => synthesis [3] => mysterious )

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