Php judges that the array is empty for two instances

Source: Internet
Author: User

The following provides the php code for determining whether the array is null. Because the array is a composite data type, we cannot process it like other complex data types. Let's look at the example below.

Method
1. Use count (array) to retrieve null records. 0 is returned.
2. Use the is_null Function

The Code is as follows: Copy code

<? Php
$ A = array ('1', '2', '3 ');
Echo count ($ );


If (is_null ($ )){
Echo '000 ';
} Else {
Echo & quot; 1111 & quot ";
}
?>

The count method is feasible.
The is_null method does not work.

Instance 2


// Determine whether an array is empty

The Code is as follows: Copy code
/**
Array (
); Null
Array (
Array (
),
Array (
),
Array (
)
); Null
Array (
Array (
),
Array (
Array (
),
Array (
1 => 1
)
),
Array (
)
); Not empty
*/
Function is_array_null ($ value)
{
If (empty ($ value ))
{
Return $ value;
}
Else
{
Return is_array ($ value )? Array_map ('array _ null', $ value): addslashes ($ value );
}
}

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