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PHP Var_dump () Function

The var_dump() function is used to get information about a variable. This function displays structured information such as the type and value of a given variable. Arrays and objects are examined recursively with values ​​indented to show structure. This function is also effective with expressions.Syntax:
void var_dump ($expsn)
Parameters : the function accepts one argument, $expsn, which can be a single variable or an expression containing multiple variables of any type, separated by a space.Return type : this function has no return type. 
Examples:
Input: $expsn = 2.7; Output: float (2.7) Input: $expsn = array (1, 2, array (3, 4, 5)); Output: array (3) {[0] = > int (1) [1] = > int (2) [2] = > array (3) {[0] = > int (3) [1] = > int (4) [2] = > int (5)}}
The following program illustrates how var_dump() works in PHP:  
// PHP code to illustrate how it works
// var_dump() functions var_dump (var_dump (2, 2.1, TRUE, array (1, 2, 3, 4)));  
?>
Output:
int (2 ) float (2.1) bool (true) array (4) {[0] = > int (1) [1] = > int (2) [2] = > int (3) [3] = > int (4)} NULL
Important points to pay attention to :
  • All properties of objects, whether public, private or protected will be returned in the output if the object does not implement the __debugInfo() method.

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