Two examples of php judging that the array is empty

The following provides two PHP codes that determine whether the array is empty. Because the array is a composite data type, we cannot process it like other character data. See examples below.

Method
1. Use count (array) to get records. Empty returns 0
2. Use is_null function

The code is as follows

代码如下

复制代码

$a=array('1','2','3');
echo count($a);

if(is_null($a)){
echo '000';
}else{
echo "1111";
}
?>

Copy code

$a=array('1','2','3');

echo count($a);

if(is_null($a)){

代码如下	复制代码
/** array( ); 空 array( array( ), array( ), array( ) ); 空 array( array( ), array( array( ), array( 1=>1 ) ), array( ) ); 非空 */ function is_array_null($value) { if (empty($value)) { return $value; } else { return is_array($value) ? array_map('array_null', $value) : addslashes($value); } }

echo '000'; }else{ echo "1111"; } ?>

Related labels：

php under for code judgment Example supply array yes of

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Two examples of php judging that the array is empty_PHP tutorial