php数组中删除元素之重新索引，php数组元素索引
如果要在某个数组中删除一个元素，可以直接用的unset，但今天看到的东西却让我大吃一惊
$arr = array('a','b','c','d');
unset($arr[1]);
print_r($arr);
?>
print_r($arr)
之后，结果却不是那样的，最终结果是 Array ( [0] => a [2] => c [3] => d )
那么怎么才能做到缺少的元素会被填补并且数组会被重新索引呢？答案是
array_splice():
$arr = array('a','b','c','d');
array_splice($arr,1,1);
print_r($arr);
?>
print_r($arr)之后，结果是A(www.111cn.net)rray ( [0] => a [1] => c [2] => d )
删除数组指定元素
array_search()比较实用
array_search() 函数与 in_array() 一样，在数组中查找一个键值。如果找到了该值，匹配元素的键名会被返回。如果没找到，则返回 false
$array = array('1', '2', '3', '4', '5');
$del_value = 3;
unset($array[array_search($del_value , $array)]);//利用unset删除这个元素
print_r($array);
输出
array('1', '2', '4', '5');
但这种如果要重新索引数组就需要利用foreach遍历删除的数组之后重新建立一个数组这样也是可以的。
来自php教程网:http://www.111cn.net/phper/php-cy/66372.htm
array_values() 返回 input 数组中所有的值并给其建立数字索引。
array_value($arr['date']);
unset($arr[1]);
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