What are some common pitfalls or errors that can occur when calling a function in PHP?

One common pitfall when calling a function in PHP is not passing the correct number of arguments. This can result in a fatal error or unexpected behavior. To avoid this, always check the function signature and provide the required arguments. Example: 

// Incorrect way of calling a function with the wrong number of arguments
$result = myFunction($arg1);

// Correct way of calling a function with the correct number of arguments
$result = myFunction($arg1, $arg2);

Keywords

syntax error undefined function fatal error incorrect parameters namespace collision

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