What are some common debugging techniques for identifying unexpected output changes in PHP variables?

When encountering unexpected output changes in PHP variables, one common debugging technique is to use var_dump() or print_r() functions to display the current value of the variables. This can help identify any unexpected data types or values. Additionally, checking for any recent code changes or modifications that might have caused the issue can also be helpful. 

// Debugging unexpected output changes in PHP variables
// Using var_dump() to display the current value of the variable
var_dump($variable);

// Using print_r() to display the current value of the variable
print_r($variable);

// Checking for any recent code changes or modifications that might have caused the issue

Keywords

var_dump error_reporting debug_backtrace xdebug php.ini

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