How can PHP syntax errors, such as unexpected T_OBJECT_OPERATOR, be resolved when attempting to implement custom code in WordPress functions.php file?

To resolve PHP syntax errors like unexpected T_OBJECT_OPERATOR in WordPress functions.php file, you can check for missing semicolons, parentheses, or curly braces in your custom code. Make sure to properly close all the brackets and parentheses in your code to avoid syntax errors. Additionally, ensure that you are using the correct syntax for object-oriented programming in PHP.

// Incorrect code causing unexpected T_OBJECT_OPERATOR error
$object->method()->property;

// Corrected code with proper syntax
$object->method()->property;