FAQ: Booleans and Comparison Operators - Identical and Not Identical Operators

This community-built FAQ covers the “Identical and Not Identical Operators” exercise from the lesson “Booleans and Comparison Operators”.

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FAQs on the exercise Identical and Not Identical Operators

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What is the difference between identical (===) and equal (==) operators? In the exercise, it is said that the equal operator is less strict, and I want to figure out its usage comparing to the identical operator.

$a == $b   Equal      TRUE if $a is equal to $b after type juggling.
$a === $b  Identical  TRUE if $a is equal to $b, and they are of the same type. 

An example

var_dump(1 == "1");   => true
var_dump(1 === "1");  => false

If you compare a number with a string or the comparison involves numerical strings, then each string is converted to a number and the comparison performed numerically.

The type conversion does not take place when the comparison is === or !== as this involves comparing the type as well as the value.


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