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ctype_print (PHP 4 >= 4.0.4, PHP 5) ctype_print -- Check for printable character(s) 说明bool ctype_print ( string text )
Checks if all of the characters in the provided string,
text, are printable.
返回值
Returns TRUE if every character in text
will actually create output (including blanks). Returns FALSE if
text contains control characters or characters
that do not have any output or control function at all.
例
例子 1. A ctype_print() example |
<?php
$strings = array('string1' => "asdf\n\r\t", 'string2' => 'arf12', 'string3' => 'LKA#@%.54');
foreach ($strings as $name => $testcase) {
if (ctype_print($testcase)) {
echo "The string '$name' consists of all printable characters.\n";
} else {
echo "The string '$name' does not consist of all printable characters.\n";
}
}
?>
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上例将输出： The string 'string1' does not consist of all printable characters.
The string 'string2' consists of all printable characters.
The string 'string3' consists of all printable characters. |
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ctype_lower