1.2.379. Double Checks¶
Double checks happen when data is checked at one point, and then, checked again, with the same test, in a following call.
Some of the testing may be pushed to the type system, for example is_int() and int type. Others can’t, as the check is not integrated in the type system, such as is_readable() and string, for a path.
The check may be removed from the method, when the method is not called elsewhere without protection. Cleaning such structure leads to micro-optimisation.
<?php
if (is_writeable($path)) {
foo($path);
}
function foo(string $path) {
// This was already tested
if (!is_writeable($path)) {
return;
}
}
?>
1.2.379.1. Suggestions¶
Remove the check in the method
Remove the check in the caller code
Use type system
1.2.379.2. Specs¶
Short name |
Structures/DoubleChecks |
Rulesets |
|
Exakat since |
2.5.2 |
PHP Version |
All |
Severity |
Minor |
Time To Fix |
Quick (30 mins) |
Precision |
High |
Available in |