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php数组函数序列之array_push() 数组尾部添加一个或多个元素（入栈），返回新长度。_php技巧

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Release： 2016-05-17 09:14:44
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array_push() 定义和用法
array_push() 函数向第一个参数的数组尾部添加一个或多个元素（入栈），然后返回新数组的长度。

该函数等于多次调用 $array[] = $value。

语法
array_push(array,value1,value2...)参数 描述
array 必需。规定一个数组。
value1 必需。规定要添加的值。
value2 可选。规定要添加的值。

提示和注释
注释：即使数组中有字符串键名，您添加的元素也始终是数字键。（参见例子 2）

注释：如果用 array_push() 来给数组增加一个单元，还不如用 $array[] =，因为这样没有调用函数的额外负担。

注释：如果第一个参数不是数组，array_push() 将发出一条警告。这和 $var[] 的行为不同，后者会新建一个数组。

例子 1

复制代码 代码如下:

$a=array("Dog","Cat");
array_push($a,"Horse","Bird");
print_r($a);
?>

输出：

Array ( [0] => Dog [1] => Cat [2] => Horse [3] => Bird )例子 2
带有字符串键的数组：
复制代码 代码如下:

$a=array("a"=>"Dog","b"=>"Cat");
array_push($a,"Horse","Bird");
print_r($a);
?>

输出：

Array ( [a] => Dog [b] => Cat [0] => Horse [1] => Bird )
Related labels：
array_push
source：php.cn
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