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<?php $string = "Hello my Name Is Paloppa: CIao I'm 20 And? Hello! Words' Man Ab"; // Word boundary before the first uppercase letter, followed by any alphanumeric character preg_match_all('/(?<!^)\b[A-Z][a-zA-Z]{1,}\.+[A-Z][a-zA-Z]{1,}\b(?!["!?.\\\'])/', $string, $matches); print_r( $matches[0] );
Output for git.master, git.master_jit, rfc.property-hooks
Array ( )

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