What does the error message "Invalid argument supplied for foreach()" in PHP indicate?

The error message "Invalid argument supplied for foreach()" in PHP indicates that the function foreach() is being used on a variable that is not an array or an object that implements the Traversable interface. To solve this issue, you should ensure that the variable passed to foreach() is indeed an array or an object that can be iterated over. 

// Example of how to check if the variable is an array before using foreach()
if(is_array($myArray)) {
    foreach($myArray as $item) {
        // code block
    }
} else {
    // handle the case where $myArray is not an array
}

Keywords

Invalid argument foreach PHP error message indication

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