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PHP删除数组元素与删除重复数组函数

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Release: 2016-06-13 11:17:51
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PHP删除数组元素与删除重复数组函数本文章主要是讲关于php数组值的删除哦,告诉你如何去删除一个数组指定位置的元素,最二款告诉你利用array_keys函  

php教程删除数组元素与删除重复数组函数
本文章主要是讲关于php数组值的删除哦,告诉你如何去删除一个数组指定位置的元素,最二款告诉你利用array_keys函数来删除数组重复元素。
*/

$a=array("red", "green", "blue", "yellow");   
count($a); //得到4   
unset($a[1]); //删除第二个元素   
count($a); //得到3   
echo $a[2]; //数组中仅有三个元素,本想得到最后一个元素,但却得到blue,   
echo $a[1]; //无值 

//array array_splice (array input, int offset [, int length [, array replacement]])
//array_splice()其实是替换数组元素的函数,但如果不加替换值就简单的删除元素.下面是array_splice()的用法:
$b=array("red", "green", "blue", "yellow");
array_splice($a,1,1);

  


//下面看一个比较全面的删除重复值并且删除指定的数组元素

$array1 = array(1 => "www.bkjia.com", 2 => "菠萝", 4 => " => "香蕉",4 => "芭乐",5 => " => "www.bkjia.com");

$search_keys = array_keys($array1, "www.bkjia.com");

foreach($search_keys as $key) {
 unset($array1[$key]);
}


print_r($array1);

/*
得到结果
array ( [2] => 菠萝 [4] => 芭乐 [3] => 香蕉 )
*/

//删除数组中重复元素的函数
function delmember(&$array, $id)
{
$size = count($array);
for($i = 0; $i {
$array[$id + $i] = $array[$id + $i + 1];
}
unset($array[$size - 1]);
}


?>


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