简体中文（ZH-CN）English（EN）繁体中文（ZH-TW）日本語（JA）한국어（KO）Melayu（MS）Français（FR）Deutsch（DE）
Home
Article
Q&A
Course
Topic
Download
Game
Dictionary
Recent Updates

Home  >  Article  >  Backend Development  >  Two examples of php judging that the array is empty_PHP tutorial

Two examples of php judging that the array is empty_PHP tutorial

WBOY
WBOYOriginal
2016-07-13 16:59:23818browse

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"; } ?>

The count method is feasible The is_null method does not work Example 2 //Determine whether an array is empty
The code is as follows Copy code
/** 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); } } http://www.bkjia.com/PHPjc/631319.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/631319.htmlTechArticleThe following provides two PHP codes that determine whether the array is empty, because the array is a composite data type and we cannot It is processed like other character data, see examples below. Method 1. Use cou...
Statement：
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Previous article：Convert datetime type date and time to Chinese representation_PHP tutorialNext article：Convert datetime type date and time to Chinese representation_PHP tutorial

Related articles

See more