ctype_graph
(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)
ctype_graph — Check for any printable character(s) except space
Description
Checks if all of the characters in the provided string,
text, creates visible output.
Parameters
-
text -
The tested string.
Note:
If an int between -128 and 255 inclusive is provided, it is interpreted as the ASCII value of a single character (negative values have 256 added in order to allow characters in the Extended ASCII range). Any other integer is interpreted as a string containing the decimal digits of the integer.
WarningAs of PHP 8.1.0, passing a non-string argument is deprecated. In the future, the argument will be interpreted as a string instead of an ASCII codepoint. Depending on the intended behavior, the argument should either be cast to string or an explicit call to chr() should be made.
Return Values
Returns true if every character in text is
printable and actually creates visible output (no white space), false
otherwise.
When called with an empty string the result will always be false.
Examples
Example #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";
}
}
?>
The above example will output:
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.
See Also
- ctype_alnum() - Check for alphanumeric character(s)
- ctype_print() - Check for printable character(s)
- ctype_punct() - Check for any printable character which is not whitespace or an alphanumeric character
