How can the error message "Invalid argument supplied for foreach()" be resolved in PHP?

The error message "Invalid argument supplied for foreach()" occurs when you try to iterate over a variable that is not an array. To resolve this issue, you should check if the variable is an array before using it in a foreach loop. You can use the is_array() function to perform this check.

if(is_array($variable)){
    foreach($variable as $item){
        // Your code here
    }
} else {
    // Handle the case when $variable is not an array
}