php ctype函数中文翻译和示例(2)

<?php 
$strings = array('1820.20', '10002', 'wsl!12'); 
foreach ($strings as $testcase) { 
    if (ctype_digit($testcase)) { 
        echo "The string $testcase consists of all digits.\n"; 
    } else { 
        echo "The string $testcase does not consist of all digits.\n"; 
    } 
} 
?>  

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