Php to determine whether the program is an array code _ PHP Tutorial-php Tutorial

Php determines whether it is an array program code. In php, it is very easy to determine whether the variable is an array. Using the is_array () function in php can quickly determine whether the variable is an array. I will introduce it to you below. Is_array: it is very easy to check whether the variable is an array in php. Using the is_array () function in php, you can quickly determine whether the variable is an array. I will introduce it to you below.

Is_array-check whether the variable is an array

Report a bug description
Bool is_array (mixed $ var)

If var is array, TRUE is returned; otherwise, FALSE is returned.

Example

The code is as follows:
$ A = 1; If (is_array ($ )) { Echo 'is an array '; } Else { Echo 'not array 0 '; }

Example

The code is as follows:
Function is_vector (& $ array ){ If (! Is_array ($ array) | empty ($ array )){ Return-1; } $ Next = 0; Foreach ($ array as $ k => $ v ){ If ($ k! ==$ Next) return false; $ Next ++; } Return true; } ?>

Method for determining whether to index an array

Echo is_assoc ($ array )? 'Index array': 'not an index array ';

The code is as follows:
Function is_assoc ($ array ){ If (is_array ($ array )){ $ Keys = array_keys ($ array ); Return $ keys! = Array_keys ($ keys ); } Return false; }

The evaluate () function can quickly determine whether the variable is an array. I will introduce it to you below. Is_array checks whether the variable is a number...