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IntlChar::iscntrl() function in PHP
The IntlChar::iscntrl() function is used to check the given input is a control character or not. Examples include line feed (
), tab (\t), etc.
Syntax
IntlChar::iscntrl( val )
Parameters
val − An integer values or character encoded as a UTF-8 string.
Return
The IntlChar::iscntrl() function returns TRUE if the val is a control character.
Example
The following is an example −
<?php
var_dump(IntlChar::iscntrl("
"));
echo "<br>";
var_dump(IntlChar::iscntrl("ahjh"));
echo "<br>";
var_dump(IntlChar::iscntrl("12345"));
?>Output
The following is the output −
bool(true) NULL NULL
Example
Let us now see another example wherein we are checking whether the entered value is a control character or not −
<?php
var_dump(IntlChar::iscntrl("\r"));
echo "<br>";
var_dump(IntlChar::iscntrl("878"));
echo "<br>";
?>Output
The following is the output −
bool(true) NULL
Updated on: 30-Dec-2019
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