What is the potential cause of the "Invalid argument supplied for foreach()" error in PHP?

The "Invalid argument supplied for foreach()" error in PHP occurs when you try to loop through a variable that is not an array or an object that cannot be iterated over. To solve this issue, you should check if the variable is an array or an object before using it in a foreach loop. 

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

Keywords

Invalid argument foreach error PHP cause

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