PHP if Operators
Comparison Operators
If statements usually contain conditions that compare two values.
Example
Check if $t is equal to 14:
$t = 14;
if ($t == 14) {
echo "Have a good day!";
}
To compare two values, we need to use a comparison operator.
Here are the PHP comparison operators to use in if statements:
| Operator | Name | Result | Try it |
|---|---|---|---|
| == | Equal | Returns true if the values are equal | Try it » |
| === | Identical | Returns true if the values and data types are identical | Try it » |
| != | Not equal | Returns true if the values are not equal | Try it » |
| <> | Not equal | Returns true if the values are not equal | Try it » |
| !== | Not identical | Returns true if the values or data types are not identical | Try it » |
| > | Greater than | Returns true if the first value is greater than the second value | Try it » |
| < | Less than | Returns true if the first value is less than the second value | Try it » |
| >= | Greater than or equal to | Returns true if the first value is greater than, or equal to, the second value | Try it » |
| <= | Less than or equal to | Returns true if the first value is less than, or equal to, the second value | Try it » |
Logical Operators
To check more than one condition, we can use logical operators, like the && operator:
Example
Check if $a is greater than $b,
AND if $a is less than $c:
$a = 200;
$b = 33;
$c = 500;
if ($a > $b && $a < $c ) {
echo "Both conditions are true";
}
Here are the PHP logical operators to use in if statements:
| Operator | Name | Description | Try it |
|---|---|---|---|
| and | And | True if both conditions are true | Try it » |
| && | And | True if both conditions are true | Try it » |
| or | Or | True if either condition is true | Try it » |
| || | Or | True if either condition is true | Try it » |
| xor | Xor | True if either condition is true, but not both | Try it » |
| ! | Not | True if condition is not true | Try it » |
We can compare as many conditions as we like in one if statement:
Example
Check if $a is either 2, 3, 4, 5, 6, or 7:
$a = 5;
if ($a == 2 || $a == 3 || $a == 4 || $a == 5 || $a == 6 || $a == 7) {
echo "$a is a number between 2 and 7";
}
