The IntlChar isdefined() function checks whether the entered value is defined or not.
Syntax
bool IntlChar::isdefined (val)
Parameters
val − An integer or character encoded as a UTF-8 string.
Return
The IntlChar isdefined() function returns TRUE if val is a defined character.
Example
The following is an example −
<?php
var_dump(IntlChar::isdefined("Z"));
echo "<br>";
var_dump(IntlChar::isdefined(" "));
echo "<br>";
var_dump(IntlChar::isdefined("HJHK"));
echo "<br>";
var_dump(IntlChar::isdefined("89"));
?>Output
The following is the output −
bool(true) bool(true) NULL NULL