What is the difference between == and === Operators in PHP?
PHP equal operator (==) and idential operator (===) are Relational or Comparison Operators in PHP langauge.
The only difference is that === operator matches the values along with Data types. While == operator only match values but not Data types.
Example to see difference between both operators
<?php
$num_1 = 12;
$num_2 = 12.00;
if ($num_1 == $num_2) {
echo "Value matched using ==";
} else {
echo "Value is not matched using ==";
}
echo "<br> Now we will check using === operator <br>";
if ($num_1 === $num_2) {
echo "Value is matched using ===";
} else {
echo "Value is not matched using ===";
}
?>We have compared the two variable one by one by using == and === Operator, we get the following result.
Tutorials Class - Output Window
Value matched using ==
Now we will check using === operator
Value is not matched using ===
You will see that value is matched if used the equal operator '==‘ and not matched if used identical operator '===' because data type is not same for both numbers.
Therefore, if we need to match both values strictly with datatypes, '===' operator will be used else '==' will be used in PHP.
Learn more about the similar topics:
| Tutorials |
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| PHP Operators |
| Exercises & Assignments |
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| Write a PHP program to add two numbers |
| Write a PHP program to check whether a number is positive, negative or zero |
| Interview Questions & Answers |
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| What is the difference between == and === Operators in PHP? |