No Warning For Unused Variables¶
PHP variable optimisation in action: the undefined variables are only reported when they are used.
The first is omitted : there are no operations.
The second is skipped : no need to execute the second term of the or.
The third is reporting a warning.
Of course, an assignation is not reported with an undefined variable, as it will be set. Although, may be reusage of a variable could be reported.
See Also¶
Variable optimisation [Try me]