What is == and === in PHP?
== Operator: This operator is used to check the given values are equal or not. If yes, it returns true, otherwise it returns false. Syntax: operand1 == operand2. === Operator: This operator is used to check the given values and its data type are equal or not. If yes, then it returns true, otherwise it returns false.
How PHP compares data of different types?
How PHP compares values. PHP has a feature called “type juggling”, or “type coercion”. This means that during the comparison of variables of different types, PHP will first convert them to a common, comparable type.
What does <> mean in PHP?
The spaceship operator <=> is the latest comparison operator added in PHP 7. It is a non-associative binary operator with the same precedence as equality operators ( == , !=
What is the difference between and in PHP?
The difference is, strings between double quotes (“) are parsed for variable and escape sequence substitution. Strings in single quotes (‘) aren’t. The same in single quotes returns the literal string. you would probably use single quotes, to avoid having to escape the quotes in the string and vice-versa.
What difference between $a == $b and $A $B?
a=b is called assignment where the value of b is assigned to a. a==b is a condition checking or you can call it a comparison operator which checks whether the value of a and b are equal or not.
What is difference between != and <> operator in PHP?
” and “==!” in PHP. !== Operator: It is called as non-identical operator. It returns true if operands are not equal, or they are not of the same type.
Which operator is used to compare two values?
The equality operator (==)
The equality operator (==) is used to compare two values or expressions. It is used to compare numbers, strings, Boolean values, variables, objects, arrays, or functions. The result is TRUE if the expressions are equal and FALSE otherwise.
What are PHP comparison operators?
PHP Comparison Operators
| Operator | Name | Result |
|---|---|---|
| > | Greater than | Returns true if $x is greater than $y |
| < | Less than | Returns true if $x is less than $y |
| >= | Greater than or equal to | Returns true if $x is greater than or equal to $y |
| <= | Less than or equal to | Returns true if $x is less than or equal to $y |
What does &$ mean in PHP?
passing argument through reference
passing argument through reference (&$) and by $ is that when you pass argument through reference you work on original variable, means if you change it inside your function it’s going to be changed outside of it as well, if you pass argument as a copy, function creates copy instance of this variable, and work on this …
Why echo is used in PHP?
They are both used to output data to the screen. The differences are small: echo has no return value while print has a return value of 1 so it can be used in expressions. echo can take multiple parameters (although such usage is rare) while print can take one argument. echo is marginally faster than print .
What is the difference between $message and $$ message in PHP?
$message is used to store variable data. $$message can be used to store variable of a variable. Data stored in $message is fixed while data stored in $$message can be changed dynamically.
What is the difference between $VAR and $$ VAR?
Difference between Both: The variable $var is used to store the value of the variable and the variable $$val is used to store the reference of the variable.
How do you find the difference between 2 numbers?
How to Find the Difference between Two Numbers. To find the difference between two numbers, subtract the number with the smallest value from the number with the largest value. The product of this sum is the difference between the two numbers.
What is the differences between $a != $B and $a !== $B?
$b – Check if the value of $a is not equal to $b. However, with $a !== $b, the value of $a is matched with $b, and also the ‘Type’ which must be same. == check for value and === checks for value of same types on both operands.
What is the use of === operator?
The strict equality operator ( === ) checks whether its two operands are equal, returning a Boolean result. Unlike the equality operator, the strict equality operator always considers operands of different types to be different.
What is used for numeric comparison?
If both operands are numeric, then a numeric comparison is performed. If either of the operands is a string value, then a string comparison is used. If one or both operands are Null, then the result is Null. The following determines if the contents of the Quantity field are greater than or equal to 5.
Is used to compare two values?
A logical operator is used in Excel to compare two values. Logical operators are sometimes called Boolean operators because the result of the comparison in any given case can only be either TRUE or FALSE. Six logical operators are available in Excel.
What are the 5 PHP operators?
PHP language supports following type of operators.
- Arithmetic Operators.
- Comparison Operators.
- Logical (or Relational) Operators.
- Assignment Operators.
- Conditional (or ternary) Operators.
Can you use += in PHP?
$a += 5; // sets $a to 8, as if we had said: $a = $a + 5; $b = “Hello “; $b .
…
Arithmetic Assignment Operators ¶
| Example | Equivalent | Operation |
|---|---|---|
| $a += $b | $a = $a + $b | Addition |
| $a -= $b | $a = $a – $b | Subtraction |
| $a *= $b | $a = $a * $b | Multiplication |
What is the difference between $message and $$ message?
What is the difference between print () and echo ()?
echo and print are more or less the same. They are both used to output data to the screen. The differences are small: echo has no return value while print has a return value of 1 so it can be used in expressions. echo can take multiple parameters (although such usage is rare) while print can take one argument.
What is PHP full form?
What is PHP? PHP is an acronym for “PHP: Hypertext Preprocessor” PHP is a widely-used, open source scripting language. PHP scripts are executed on the server. PHP is free to download and use.
What is difference between $message and $$ message?
What is difference between $MSG and $$ MSG in PHP?
Explain the difference between $message and $$message in PHP
$message is a variable and $$message is a variable of another variable. $$message allows the developer to change the name of the variable dynamically. PHP Include & Require – What is the difference between include and require?
What is dynamic variable PHP?
A variable of a variable takes a value of a variable and threads which is the name of a variable. This is new feature of using variables and by using double dollar signs. This technique is called a dynamic variable in PHP. Those variables you can use a dynamically generated variable of variable as well as OOP Concept.