PHP | IntlChar::isJavaIDStart() Function

The IntlChar::isJavaIDStart() function is an inbuilt function in PHP which is used to check whether the input character code point is permissible since the first character is a java identifier or not. It is True for characters with general category “Sc” (Currency Symbols), and “Pc” (Connecting Punctuation).

Syntax:

bool IntlChar::isJavaIDStart( $codepoint )

Parameters: This function accepts single parameter $codepoint which is mendatory. The input parameter $codepoint is a character or interger value, which is encoded as a UTF-8 string.

Return Value: Returns True, if $codepoint start with Java identifier character, otherwise return False.

Below programs illustrate the IntlChar::isJavaIDStart() function in PHP:

Program 1:

<?php 
// PHP function to illustrate the 
// use of IntlChar::isJavaIDStart() 
     
// Input string codepoint value with 
// Capital and small letter 
var_dump(IntlChar::isJavaIDStart("R")); 
echo "<br>"; 
  
// Input string codepoint value with small character 
var_dump(IntlChar::isJavaIDStart("r")); 
echo "<br>"; 
  
// Input control character codepoint value  
var_dump(IntlChar::isJavaIDStart("
")); 
echo "<br>"; 
    
// Input string codepoint value  
var_dump(IntlChar::isJavaIDStart("Bug")); 
echo "<br>"; 
     
// Input int codepoint value  
var_dump(IntlChar::isJavaIDStart("3 ")); 
echo "<br>"; 
   
// Input int char an identifier 
// of codepoint value 
var_dump(IntlChar::isJavaIDStart("u{007F}")); 
echo "<br>"; 
    
// Input symbolic codepoint value  
var_dump(IntlChar::isJavaIDStart(" @ ")); 
echo "<br>"; 
var_dump(IntlChar::isJavaIDStart(" $ ")); 
echo "<br>"; 
   
?> 

Output:

bool(true)
bool(true)
bool(false)
NULL
NULL
bool(false)
NULL
NULL

Program 2:

<?php 
// PHP function to illustrate the 
// use of IntlChar::isJavaIDPart() 
   
// Declare an array with 
// different codepoint value  
$arr = array("C", 
             " ",  
             "
", 
             " #", 
             "	", 
             "Code", 
        ); 
     
// For loop condition to check  
// each character through function 
foreach ($arr as $val) { 
         
    // Check each element as code point data 
    var_dump(IntlChar::isJavaIDStart($val)); 
    echo "<br>"; 
} 
?> 

Output:

bool(true)
bool(false)
bool(false)
NULL
bool(false)
NULL

Related Articles:

Reference: http://php.net/manual/en/intlchar.isjavaidstart.php

PHP | IntlChar::isJavaIDStart() Function

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