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IntlChar::isIDStart
(PHP 7)
IntlChar::isIDStart — Check if code point is permissible as the first character in an identifier
Description
Determines if the specified character is permissible as the first character in an identifier according to Unicode (The Unicode Standard, Version 3.0, chapter 5.16 Identifiers).
TRUE
for characters with general categories "L" (letters) and "Nl" (letter numbers).
Parameters
Examples
Example #1 Testing different code points
<?php
var_dump(IntlChar::isIDStart("A"));
var_dump(IntlChar::isIDStart("$"));
var_dump(IntlChar::isIDStart("\n"));
var_dump(IntlChar::isIDStart("\u{2603}"));
?>
The above example will output:
bool(true) bool(false) bool(false) bool(false)
See Also
- IntlChar::isalpha() - Check if code point is a letter character
- IntlChar::isIDPart() - Check if code point is permissible in an identifier
IntlChar::PROPERTY_ID_START
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Steph