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// PHP code to illustrate// IntlChar::isIDStart() function // Input character codepoint value var_dump(IntlChar::isIDStart("G"));// Input string codepoint value var_dump(IntlChar::isIDStart("Geeks")); // Input int codepoint value var_dump(IntlChar::isIDStart("3 "));// Input floating codepoint value var_dump(IntlChar::isIDStart("2025.6003")); // Input int char an identifier// of codepoint valuevar_dump(IntlChar::isIDStart("\u{007F}"));var_dump(IntlChar::isIDStart("\u{012C}"));// Input symbolic codepoint value var_dump(IntlChar::isIDStart(" $ "));?> |
Output:
bool(true) NULL NULL NULL bool(false) bool(true) NULL
Program 2:
PHP
<?php// PHP code to illustrate// IntlChar::isIDStart() function// Declare an array with// different codepoint value $arr = array("h", "H", ".", "999", "\n", " ", "\u{007F}" ); // For loop condition to check // each character through functionforeach ($arr as $val) { // Check each element as code point data var_dump(IntlChar::isIDStart($val));}?> |
Output:
bool(true) bool(true) bool(false) NULL bool(false) bool(false) bool(false)
Related Articles:
- IntlChar::isIDIgnorable() Function
- IntlChar::isUWhiteSpace() Function
- IntlChar::isWhitespace() Function
Reference: http://php.net/manual/en/intlchar.isidstart.php
