What could be causing the "Warning: Invalid argument supplied for foreach()" error in the PHP code provided?

The "Warning: Invalid argument supplied for foreach()" error in PHP code is usually caused when the foreach loop is trying to iterate over a variable that is not an array or an object. To solve this issue, you need to ensure that the variable being passed to the foreach loop is an array or an object. 

// Check if the variable is an array before using foreach loop
if(is_array($variable)) {
    foreach($variable as $item) {
        // Your code here
    }
} else {
    // Handle the case where $variable is not an array
}

Keywords

foreach PHP error invalid argument debugging

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