By using this function, we can check whether the variable is boolean variable or not.   Syntax bool is_bool ( mixed $var )   Parameters Parameter Description Is compulsory var_name The variable being evaluated. compulsory   Returns It return True if var is…

This data type holds only numeric values. It stores only whole number with no fractional component. The range of integers must lie between -2^31 to 2^31.   Syntax Integers can be defined in decimal(base 10), hexadecimal(base 16), octal(base 8) or binary(base…

By using this function, we can check the input variable is integer or not. This function was introduced in PHP 4.0.   Syntax bool is_int (mixed $var)   Parameters   Return type This function returns true if var_name is an integer, Otherwise false.   Example…

This data type represents decimal values. The float (floating point number) is a number with a decimal point or a number in exponential form.   Syntax $a=1.234; $x=1.2e4; $y=7E-10;   Example 1 <?php $x=22.41; echo $x; ?> Example 2 <?php $a = 11.365; var_dump($a);…

By using this function, we can check that the input value is float or not. This function was introduced in PHP 4.0.   Syntax bool is_float ( mixed $var )   Parameters Return type: The is_float() function returns TRUE if the var_name is float, otherwise false.…

 There are 2 compound data types in PHP. 1.   Array 2.   Object   Array: The array is a collection of heterogeneous (dissimilar) data types. PHP is a loosely typed language that?s why we can store any type of values in arrays. Normal variable can store single…

ᴰᵒᵖᵖᵉˡᵍᵃⁿᵍᵉʳ 多佩尔甘格尔 There are 2 special data types in PHP 1.   Resource 2.   Null   Resource Data type: It refers the external resources like database connection, FTP connection, file pointers, etc. In simple terms, a resource is a special variable which…

  By using the is_null function, we can check whether the variable is NULL or not. This function was introduced in PHP 4.0.4.   SYNATX: bool is_null ( mixed $var )   Parameter   Return Type: The PHP is_null() function returns true if var is null, otherwise…

ᴰᵒᵖᵖᵉˡᵍᵃⁿᵍᵉʳ 多佩尔甘格尔 PHP if else statement is used to test condition. There are various ways to use if statement in PHP. if if-else if-else-if nested if   PHP If Statement PHP if statement is executed if condition is true. Syntax if(condition){ //code to be…

  PHP switch statement is used to execute one statement from multiple conditions. It works like PHP if-else-if statement.   Syntax switch(expression){ case value1: //code to be executed break; case value2: //code to be executed break; ...... default: code…

PHP for loop can be used to traverse set of code for the specified number of times. It should be used if number of iteration is known otherwise use while loop. Syntax for(initialization; condition; increment/decrement){ //code to be executed }   Flowchart…

PHP while loop can be used to traverse set of code like for loop. It should be used if number of iteration is not known. Syntax while(condition){ //code to be executed }   Alternative Syntax while(condition): //code to be executed endwhile;   PHP While Loop…

PHP do while loop can be used to traverse set of code like php while loop. The PHP do-while loop is guaranteed to run at least once. It executes the code at least one time always because condition is checked after executing the code. Syntax do{ //code to…

PHP break statement breaks the execution of current for, while, do-while, switch and for-each loop. If you use break inside inner loop, it breaks the execution of inner loop only. Syntax jump statement; break;   Flowchart   PHP Break: inside loop Let's see…

PHP function is a piece of code that can be reused many times. It can take input as argument list and return value. There are thousands of built-in functions in PHP. In PHP, we can define Conditional function, Function within Function and Recursive function also.…

PHP Parameterized functions are the functions with parameters. You can pass any number of parameters inside a function. These passed parameters act as variables inside your function. They are specified inside the parentheses, after the function name. The…

PHP allows you to call function by value and reference both. In case of PHP call by value, actual value is not modified if it is modified inside the function. Let's understand the concept of call by value by the help of examples.   Example 1 In this example…

In case of PHP call by reference, actual value is modified if it is modified inside the function. In such case, you need to use & (ampersand) symbol with formal arguments. The & represents reference of the variable. Let's understand the concept of call by…

ᴰᵒᵖᵖᵉˡᵍᵃⁿᵍᵉʳ 多佩尔甘格尔 PHP allows you to define C++ style default argument values. In such case, if you don't pass any value to the function, it will use default argument value. Let' see the simple example of using PHP default arguments in function.   Example…

PHP supports variable length argument function. It means you can pass 0, 1 or n number of arguments in function. To do so, you need to use 3 ellipses (dots) before the argument name. The 3 dot concept is implemented for variable length argument since PHP…