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  • Difference Between $a and $$a in PHP

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    $$a uses the value of the variable whose name is the value of $a.
    It means $$a is known as reference variable where as $a is normal variable.
    It allows you to have a variable of variable This program can create the variable name the same way it can create any other string.

    PHP

    <?php
    
        $test = "hello findnerd";
        $a = "test";
        echo $$a;
    
        //output will be hello findnerd
    ?>
    

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