1.2.297. Could Use Short Assignation¶
Use short assignment operator, to speed up code, and keep syntax clear.
Some operators, like * or +, have a compact and fast ‘do-and-assign’ version. They looks like a compacted version for = and the operator. This syntax is good for readability, and saves some memory in the process.
Depending on the operator, not all permutations of arguments are possible. For example, $a = $a - 2 can use the -= short operator, but $a = 2 - $a doesn’t.
Addition and short assignation of addition have a different set of features when applied to arrays. Do not exchange one another in that case.
Short operators are faster than the extended version, though it is a micro-optimization.
<?php
$a = 10 + $a;
$a += 10;
$b = $b - 1;
$b -= 1;
$c = $c * 2;
$c *= 2;
$d = $d / 3;
$d /= 3;
$e = $e % 4;
$e %= 4;
$f = $f | 5;
$f |= 5;
$g = $g & 6;
$g &= 6;
$h = $h ^ 7;
$h ^= 7;
$i = $i >> 8;
$i >>= 8;
$j = $j << 9;
$j <<= 9;
// PHP 7.4 and more recent
$l = $l ?? 'value';
$l ??= 'value';
?>
See also Assignation Operators.
1.2.297.1. Suggestions¶
Change the expression to use the short assignation
1.2.297.2. Specs¶
Short name |
Structures/CouldUseShortAssignation |
Rulesets |
All, Analyze, CE, CI-checks, Changed Behavior, Performances, Rector |
Exakat since |
0.8.4 |
PHP Version |
All |
Severity |
Minor |
Time To Fix |
Instant (5 mins) |
Precision |
Very high |
Features |
short-assignation |
ClearPHP |
|
Examples |
|
Available in |