What common mistake leads to the error "Call to a member function on a non-object" in PHP?

The common mistake that leads to the error "Call to a member function on a non-object" in PHP is trying to call a method on a variable that is not an object. This error typically occurs when trying to access a method on a variable that is null or not properly initialized as an object. To solve this issue, ensure that the variable you are trying to call a method on is indeed an object before attempting to access its methods. 

// Incorrect code that leads to the error
$variable = null;
$variable->method(); // This will result in "Call to a member function on a non-object" error

// Correct way to fix the issue
$object = new ClassName(); // Initialize the object properly
$object->method(); // Now you can safely call the method on the object

Keywords

PHP error Call to a member function non-object mistake

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