The 3 different equals

 

What is the difference between = , == , and === ?

I think using one equal sign is to declare a variable while two equal signs is for a comparison condition and lastly three equal signs is for comparing values of declared variables.

You have = the assignment operator , == the 'equal' comparison operator and === the 'identical' comparison operator . 

$a = $b     Assign      Sets $a to be equal to $b.
$a == $b    Equal       TRUE if $a is equal to $b.
$a === $b   Identical   TRUE if $a is equal to $b, and they are of the same type. (introduced in PHP 4)

For more info on the need for == and === , and situations to use each, look at the docs.

  • = is the assignment operator
  • == is the comparison operator (checks if two variables have equal values)
  • === is the identical comparison operator (checks if two variables have equal values and are of the same type).

    • = assignment operator

    == checks if two variables have the same value

    === checks if two variables have the same value AND if their types are the same

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