IntlChar::isJavaIDStart
PHP function
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(PHP 7, PHP 8)
Check if code point is permissible as the first character in a Java identifier
Description
IntlChar::isJavaIDStart(int|string $codepoint): bool|null
Determines if the specified character is permissible as the start of a Java identifier.
In addition to IntlChar::isIDStart(), true for characters with general categories "Sc" (currency symbols) and "Pc" (connecting punctuation).
Parameters
codepointParameter
Return Values
Returns true if codepoint may start a Java identifier, false if not. Returns null on failure.
Examples
Example
php
<?php
var_dump(IntlChar::isJavaIDStart("A"));
var_dump(IntlChar::isJavaIDStart("$"));
var_dump(IntlChar::isJavaIDStart("\n"));
var_dump(IntlChar::isJavaIDStart("\u{2603}"));
?>The above example will output:
output
bool(true)
bool(true)
bool(false)
bool(false)