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php數(shù)組函數(shù)序列之a(chǎn)rray_push() 數(shù)組尾部添加一個(gè)或多個(gè)元素（入棧），返回新長(zhǎng)度。
php數(shù)組函數(shù)序列之a(chǎn)rray_push() 數(shù)組尾部添加一個(gè)或多個(gè)元素（入棧），返回新長(zhǎng)度。
Jun 13, 2016 pm 12:04 PM
array_push() 定義和用法
array_push() 函數(shù)向第一個(gè)參數(shù)的數(shù)組尾部添加一個(gè)或多個(gè)元素（入棧），然后返回新數(shù)組的長(zhǎng)度。
該函數(shù)等于多次調(diào)用 $array[] = $value。
語(yǔ)法
array_push(array,value1,value2...)參數(shù) 描述
array 必需。規(guī)定一個(gè)數(shù)組。
value1 必需。規(guī)定要添加的值。
value2 可選。規(guī)定要添加的值。
提示和注釋
注釋：即使數(shù)組中有字符串鍵名，您添加的元素也始終是數(shù)字鍵。（參見(jiàn)例子 2）
注釋：如果用 array_push() 來(lái)給數(shù)組增加一個(gè)單元，還不如用 $array[] =，因?yàn)檫@樣沒(méi)有調(diào)用函數(shù)的額外負(fù)擔(dān)。
注釋：如果第一個(gè)參數(shù)不是數(shù)組，array_push() 將發(fā)出一條警告。這和 $var[] 的行為不同，后者會(huì)新建一個(gè)數(shù)組。
例子 1
復(fù)制代碼 代碼如下:
$a=array("Dog","Cat");
array_push($a,"Horse","Bird");
print_r($a);
?>
輸出：
Array ( [0] => Dog [1] => Cat [2] => Horse [3] => Bird )例子 2
帶有字符串鍵的數(shù)組：
復(fù)制代碼 代碼如下:
$a=array("a"=>"Dog","b"=>"Cat");
array_push($a,"Horse","Bird");
print_r($a);
?>
輸出：
Array ( [a] => Dog [b] => Cat [0] => Horse [1] => Bird )
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