close
<?php
$strings = array('KjgWZC', 'arf12');
foreach ($strings as $testcase) {
if (ctype_alpha($testcase)) {
echo "The string $testcase consists of all letters.\n";
} else {
echo "The string $testcase does not consist of all letters.\n";
}
}
?>
以上例程会输出：
The string KjgWZC consists of all letters.
The string arf12 does not consist of all letters.
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