Your question: What does |= mean in PHP?

Its a bitwise OR assignment operator. See PHP menual $var1 |= $var2 //it means $var1 = $var1 or $var2.

What does === mean in PHP?

The comparison operator called Equal Operator is the double equal sign “==”. … The assignment operator changes and assigns the variable on the left to have a new value as the variable on right, while the equal operator == tests for equality and returns true or false as per the comparison results.

What is the difference between == and === in PHP?

Difference between == and ===

Two of the many comparison operators used by PHP are ‘==’ (i.e. equal) and ‘===’ (i.e. identical). The difference between the two is that ‘==’ should be used to check if the values of the two operands are equal or not.

What is the use of === operator in PHP?

PHP Comparison Operators

Operator Name Result
=== Identical Returns true if $x is equal to $y, and they are of the same type
!= Not equal Returns true if $x is not equal to $y
<> Not equal Returns true if $x is not equal to $y
!== Not identical Returns true if $x is not equal to $y, or they are not of the same type
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What does the sign mean in PHP?

Rasmus Lerdorf, the father of the PHP language, explains the $ sign as an ability to insert variables inside literal string values (interpolation), so that the variables are distinguished from the rest of the string. … This symbol is called “sigil” and simplifies interpolation.

What === means?

Strict equality (===) means values which we are comparing must have the same type. This means “2” will not be equal to 2 (“2″===2 it will return false) Type converting equality (==) means automatically it will covert the variable to value irrespective of data type; either it is a string or a number.


The is_null() function checks whether a variable is NULL or not. This function returns true (1) if the variable is NULL, otherwise it returns false/nothing.

Does PHP use ==?

Difference between == (equal) and === (identical equal)

PHP provides two comparison operators to check equality of two values.

What is PHP and why it is used?

PHP is a server side scripting language that is embedded in HTML. It is used to manage dynamic content, databases, session tracking, even build entire e-commerce sites. It is integrated with a number of popular databases, including MySQL, PostgreSQL, Oracle, Sybase, Informix, and Microsoft SQL Server.

What is PHP full form?

PHP (recursive acronym for PHP: Hypertext Preprocessor ) is a widely-used open source general-purpose scripting language that is especially suited for web development and can be embedded into HTML.

What are the operators in PHP?

PHP Operator is a symbol i.e used to perform operations on operands. In simple words, operators are used to perform operations on variables or values.

PHP Operators Precedence.

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Operators Additional Information Associativity
= += -= *= **= /= .= %= &= |= ^= <<= >>= => assignment right
and logical left
xor logical left

What are PHP functions?

A function is a piece of code which takes one more input in the form of parameter and does some processing and returns a value. You already have seen many functions like fopen() and fread() etc. They are built-in functions but PHP gives you option to create your own functions as well.

Is a number PHP?

The is_numeric() function checks whether a variable is a number or a numeric string. This function returns true (1) if the variable is a number or a numeric string, otherwise it returns false/nothing.

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