PHP array index and key value operation skills example analysis, operation skills example analysis_PHP tutorial

PHP array index and key value operation skills example analysis, operation skills example analysis

This article describes the PHP array index and key value operation skills with examples. Share it with everyone for your reference. The details are as follows:

<&#63;php 
$array = array("a", "b","c"); //定义数组 
$array[] = "Simon"; //增加一个新的数组元素 
print_r($array); //输出数组 
&#63;> 

<&#63;php 
$array = array("a", "b","c"); //定义数组 
$array[9] = "Simon"; //增加一个新的数组元素 
print_r($array); //输出数组 
&#63;> 

<&#63;php 
//创建一个简单的数组 
$array = array(0=>1, 1=>2, 2=>3, 3=>4, 6=>5); 
print_r($array); 
//现在把数组中键为2的值更新为100 
$array[2] = 100; 
print_r($array); 
//现在添加一个键 
$array["X"] = 50; 
print_r($array); 
//现在删除所有键，但保持数组本身的结构 
foreach($array as $i => $value)  
{ 
  unset($array[$i]); 
} 
print_r($array); 
//再添加一个键 
$array[] = 25; 
print_r($array); 
//使用array_values函数进行重新索引 
$array = array_values($array); 
$array[] = 13; 
print_r($array); 
&#63;>

I hope this article will be helpful to everyone’s PHP programming design.

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