Are there specific functions in PHP that allow for passing parameters by reference?

In PHP, you can pass parameters by reference using the "&" symbol before the parameter name in the function definition. This allows you to modify the original value of the variable passed to the function. It is important to note that not all functions in PHP support passing parameters by reference, so you should check the documentation for specific functions. 

function incrementByReference(&$num) {
    $num++;
}

$value = 5;
incrementByReference($value);
echo $value; // Output: 6

Keywords

PHP functions passing parameters reference call by reference

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