(PHP 7, PHP 8)
IntlChar::isdefined — Checc whether the code point is defined
Determines whether the specified code point is "defined", which usually means that it is assigned a character.
true
for general categories other than "Cn" (other, not assigned).
Note :
Note that non-character code poins (e.g., U+FDD0) are not "defined" (they are Cn), but surrogate code poins are "defined" (Cs).
Returns
true
if
codepoint
is a defined character,
false
if not. Returns
null
on failure.
Example #1 Testing different code poins
<?php
var_dump
(
IntlChar
::
isdefined
(
"A"
));
var_dump
(
IntlChar
::
isdefined
(
" "
));
var_dump
(
IntlChar
::
isdefined
(
"\u{FDD0}"
));
?>
The above example will output:
bool(true) bool(true) bool(false)