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<?php $strings = array('AbCd1zyZ9', 'abcd'); foreach ($strings as $testcase) { if (ctype_alnum($testcase)) { echo "The string $testcase consists of all letters or digits.\n"; } else { echo "The string $testcase does not consist of all letters or digits.\n"; } }
Output for git.master, git.master_jit, rfc.property-hooks
The string AbCd1zyZ9 consists of all letters or digits. The string abcd consists of all letters or digits.

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