Sharing how to traverse arrays in php_PHP tutorial

Arrays are divided into two categories in PHP: numerically indexed arrays and associative arrays.
The numeric index array is the same as the array in C language, the subscripts are 0, 1, 2...
The subscript of the associative array may be of any type, similar to hash, map and other structures in other languages.
Method 1: foreach

Copy code The code is as follows:

$sports = array (
'football' => 'good',
'swimming' => 'very well',
'running' => 'not good');
foreach ($sports as $key => $value) {
echo $key.": ".$value."
";
}
?>

Output result:
football: good
swimming: very well
running: not good
Method 2: each

Copy code The code is as follows:

$sports = array(
'football' => 'good',
'swimming' => 'very well',
'running' => 'not good');
while (!!$elem = each($sports)) {
echo $elem['key'].": " .$elem['value']."
";
}
?>

Output result:
football: good
swimming : very well
running: not good

Method 3: list & each

Copy code The code is as follows:

$sports = array(
'football' => 'good',
'swimming' => 'very well',
'running' = > 'not good');
while (!!list($key, $value) = each($sports)) {
echo $key.": ".$value."
";
}
?>

Output result:
football: good
swimming: very well
running: not good

http://www.bkjia.com/PHPjc/325226.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/325226.htmlTechArticleArrays in PHP are divided into two categories: numeric index arrays and associative arrays. The numeric index array is the same as the array in C language. The subscripts are 0, 1, 2... and the associative array subscripts may be arbitrary...