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php数组索引与键值操作技巧实例分析

Jun 13, 2016 am 09:00 AM
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php数组索引与键值操作技巧实例分析

         本文实例讲述了php数组索引与键值操作技巧。分享给大家供大家参考。具体如下:

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$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

?>

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$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

?>

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//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);

?>

        希望本文所述对大家的php程序设计有所帮助。

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