Are there any specific guidelines for using variables in function parameters in PHP?

When using variables in function parameters in PHP, it is important to remember that variables passed by reference can be modified within the function. To avoid unintended side effects, it is recommended to pass variables by value unless necessary. This can be done by simply passing the variable itself without using the reference operator (&) in the function parameter. 

// Passing variable by value
function myFunction($var) {
    // Function logic here
}

$myVar = 10;
myFunction($myVar);

Keywords

variables function parameters guidelines PHP programming

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