PHP | What is difference between == and === operator?
"==" and "==="
The two operators are known as comparison operators. "==" (i.e. equal) and === (i.e. identical) both are use to check values are same or not. The difference between the two is that '==' should be used to check if the values of the two operands are equal or not whereas, '===' checks the values as well as the type of operands.
== (equal):
<?php
if("123 " == 123) {
echo "YES";
} else {
echo "NO";
}
?>
//Output: Yes
The code above will print "YES". The reason is that the values of the operands are equal.
=== (Identical):
Whereas when we run the example code below:
<?php
if("123 " === 123 ) {
echo "YES";
} else {
echo "NO";
}
?>
//Output: No
The result we get is "NO". because both operands are the same but their types are different, "123 " (with quotes) is a string whereas 123 (without quotes) is an integer.
