PHP arrays and conditions, loop statement learning_PHP tutorial

1. Array

Example 1:

1). Rendering preview:

2).Code screenshot:

The following is a two-dimensional array, which is often used in practice.

$mess = array('title'=>'Message title 1','content'=>'Content','ctime'=>'2012-1-1 12:34:23'); //Associative array

//Statement to traverse the array

//The first type
foreach($mess as $v){ //foreach can traverse associative arrays; while the for loop can only traverse enumeration arrays, not associative arrays.
//$v It is the value that receives the array element. The number of iterations of the loop body is determined by the array element
echo $v.'
';
}

//The second type
foreach($mess as $k=>$v){
//$k is used to receive the key name or index corresponding to the data element, $v is to receive the array element The value of
echo $k.'-----'.$v.'
';

Example 2:

1). Rendering preview:

2).Code screenshot:

http://www.bkjia.com/PHPjc/326316.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/326316.htmlTechArticle1. Array example 1: 1). Rendering preview: 2). Code screenshot: The following is a two-dimensional Array, actually used more often. $mess = array('title'='Message title 1','content'='content','ctime'='2012-1...