How can PHP developers ensure that variables are not overwritten when using multiple functions in a script?

To ensure that variables are not overwritten when using multiple functions in a script, PHP developers can use local variables within each function scope. By declaring variables as local within a function, they are only accessible within that specific function and cannot be overwritten by variables with the same name in other functions or the global scope. 

function function1() {
    $variable1 = "Function 1";
    echo $variable1;
}

function function2() {
    $variable2 = "Function 2";
    echo $variable2;
}

function1(); // Output: Function 1
function2(); // Output: Function 2

Keywords

PHP variables scope functions global variables

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