How can the use of eval strings in PHP be avoided when dynamically calling functions based on predefined names or indexes?

Using eval strings in PHP can be avoided by using the call_user_func or call_user_func_array functions to dynamically call functions based on predefined names or indexes. These functions allow you to call a function by passing the function name as a string without the need for eval, which can pose security risks. 

// Example of dynamically calling a function without using eval
$functionName = 'myFunction';
$args = ['arg1', 'arg2'];

if (function_exists($functionName)) {
    call_user_func_array($functionName, $args);
} else {
    echo 'Function does not exist';
}

function myFunction($arg1, $arg2) {
    echo "Arguments: $arg1, $arg2";
}

Keywords

eval strings PHP dynamically calling functions predefined names

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