Oihana PHP

isLiteral.php

Table of Contents

Functions

isLiteral()  : bool
Checks whether a given value is a literal string representing a boolean (`true` or `false`) or `null`.

Functions

isLiteral()

Checks whether a given value is a literal string representing a boolean (`true` or `false`) or `null`.

isLiteral(mixed $value) : bool

This function returns true only if the value is a string and equals (case-insensitive) to one of the three literal values: "true", "false", or "null".

Parameters
$value : mixed

The value to test.

Tags
example 
isLiteral('true');   // true
isLiteral('False');  // true
isLiteral('null');   // true
isLiteral('yes');    // false
isLiteral(true);     // false
isLiteral(null);     // false
author

Marc Alcaraz (ekameleon)

since
1.0.0
Return values
bool —

Returns true if the value is a string and matches "true", "false", or "null" (case-insensitive).


        

        
    




    

    

                                

                

                            
    

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