How can functions in PHP be called within other functions with variables?

To call a function within another function with variables in PHP, you can simply pass the variables as arguments when calling the function. This allows the inner function to access and work with the variables passed from the outer function. 

function outerFunction($var1, $var2) {
    // do something with $var1 and $var2
    innerFunction($var1, $var2);
}

function innerFunction($param1, $param2) {
    // do something with $param1 and $param2
}

// Call the outer function
outerFunction($value1, $value2);

Keywords

PHP functions variables calling nested

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