PHP | IntlChar::isIDStart() Function
Last Updated :
04 Nov, 2020
The IntlChar::isIDStart() function is an inbuilt function in PHP which is used to check whether the given input character code point is permissible since the first character is an identifier or not. It is True for characters with general category “L” (Letters), and “Nl” (letters numbers).
Syntax:
bool IntlChar::isIDStart( $codepoint )
Parameters: This function accepts a single parameter $codepoint which is mandatory. The input parameter is a character or integer value, which is encoded as a UTF-8 string.
Return Value: If $codepoint start with an identifier character then returns True, otherwise return False.
Below programs illustrate the IntlChar::isIDStart() Function in PHP:
Program 1:
PHP
<?php
var_dump(IntlChar::isIDStart( "G" ));
var_dump(IntlChar::isIDStart( "Geeks" ));
var_dump(IntlChar::isIDStart( "3 " ));
var_dump(IntlChar::isIDStart( "2025.6003" ));
var_dump(IntlChar::isIDStart( "\u{007F}" ));
var_dump(IntlChar::isIDStart( "\u{012C}" ));
var_dump(IntlChar::isIDStart( " $ " ));
?>
|
Output:
bool(true)
NULL
NULL
NULL
bool(false)
bool(true)
NULL
Program 2:
PHP
<?php
$arr = array ( "h" ,
"H" ,
"." ,
"999" ,
"\n" ,
" " ,
"\u{007F}"
);
foreach ( $arr as $val ) {
var_dump(IntlChar::isIDStart( $val ));
}
?>
|
Output:
bool(true)
bool(true)
bool(false)
NULL
bool(false)
bool(false)
bool(false)
Related Articles:
Reference: http://php.net/manual/en/intlchar.isidstart.php
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