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<?php $key = 'devices.deviceId.*'; if ( preg_match('/^([\w._]{1,})?\.*{1}?$/i', $key) ) { echo 'ist OK.'; } else { echo 'Format ist nicht OK.'; }
Output for git.master, git.master_jit, rfc.property-hooks
Warning: preg_match(): Compilation failed: quantifier does not follow a repeatable item at offset 19 in /in/FCiPC on line 4 Format ist nicht OK.

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