PHP Programming/Comparison
The operators for comparison in PHP are the following:
| Operator | Name | Returns true, if… |
|---|---|---|
| == | equal | left & right side equals |
| === | identical | == is true, and both sides have the same type |
| != | not equal | left & right are not equal after type juggling |
| <> | not equal | synonym of != |
| !== | not identical | != is true, or their types differ |
| <> | not equal | synonym of != |
| < | less than | left side is strictly less than right side |
| > | greater than | left side is strictly greater than right side |
| <= | less than or equal to | left side is less than or equal to right side |
| >= | greater than or equal to | left side is greater than or equal to right side |
| <=> | spaceship | integer less than, equal to, or greater than zero when left side is respectively less than, equal to, or greater than right side (≥ PHP 7). |
| $a ?? $b ?? $c |
null coalescing | first operand from left to right that exists and is not NULL. NULL, if no values are defined and that not NULL (≥ PHP 7). |
Example of comparisons
editThis example sets and prints arrays.
PHP Code:
<?php
$value1 = 5;
$value2 = 7;
if ($value1 == $value2) {
print('value1 is equal to value2');
} else {
print('value1 is unequal to value2');
}
?>
PHP Output:
value1 is unequal to value2
HTML Render:
value1 is unequal to value2
External Links
edit