ctype_print
Check for printable character(s)
Description
bool ctype_print(mixed $text)
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.
Warning
As 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
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.
When called with an empty string the result will always be false.
Examples
Example #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";
}
}
?>
The above example will output:
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.
See Also
- ctype_cntrl
- ctype_graph
- ctype_punct
- IntlChar::isprint