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ctype_graph (PHP 4 >= 4.0.4, PHP 5) ctype_graph -- Check for any printable character(s) except space 说明bool ctype_graph ( string text )
Checks if all of the characters in the provided string,
text, creates visible output.
返回值
Returns TRUE if every character in text is
printable and actually creates visible output (no white space), FALSE
otherwise.
例
例子 1. A ctype_graph() example |
<?php
$strings = array('string1' => "asdf\n\r\t", 'string2' => 'arf12', 'string3' => 'LKA#@%.54');
foreach ($strings as $name => $testcase) {
if (ctype_graph($testcase)) {
echo "The string '$name' consists of all (visibly) printable characters.\n";
} else {
echo "The string '$name' does not consist of all (visibly) printable characters.\n";
}
}
?>
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上例将输出： The string 'string1' does not consist of all (visibly) printable characters.
The string 'string2' consists of all (visibly) printable characters.
The string 'string3' consists of all (visibly) printable characters. |
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ctype_digit