IntlChar::iscntrl() function in PHP

PHPServer Side ProgrammingProgramming

The IntlChar::iscntrl() function is used to check the given input is a control character or not. Examples include line feed (\n), 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("\n"));
   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
raja
Updated on 30-Dec-2019 07:39:32

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