- 線上書籍

:::

prev

21. sort()和rsort() next

next

PHP(2015-10)
============

Aside from the `<span class="keyword" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0);">array</span>()` function itself,`array_push()` is arguably the most common and useful function for manipulating arrays.

`array_push()` takes two arguments: an array, and an element to add to the end of that array. Here's an example:

```
<pre style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); color: rgb(197, 200, 198); border-radius: 2px; padding: 7px 10px; font-size: 15px; line-height: 22px; background-color: rgb(35, 44, 49);">
```
<span class="variable" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); color: rgb(181, 137, 0);"><span class="variable" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0);">$fav_bands</span></span> = <span class="keyword" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); color: rgb(178, 148, 187);"><span class="keyword" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0);">array</span></span>();
array_push(<span class="variable" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); color: rgb(181, 137, 0);"><span class="variable" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0);">$fav_bands</span></span>, <span class="string" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); color: rgb(181, 189, 104);"><span class="string" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0);">"Maroon 5"</span></span>);
array_push(<span class="variable" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); color: rgb(181, 137, 0);"><span class="variable" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0);">$fav_bands</span></span>, <span class="string" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); color: rgb(181, 189, 104);"><span class="string" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0);">"Bruno Mars"</span></span>);
array_push(<span class="variable" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); color: rgb(181, 137, 0);"><span class="variable" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0);">$fav_bands</span></span>, <span class="string" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); color: rgb(181, 189, 104);"><span class="string" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0);">"Nickelback"</span></span>);
array_push(<span class="variable" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); color: rgb(181, 137, 0);"><span class="variable" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0);">$fav_bands</span></span>, <span class="string" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); color: rgb(181, 189, 104);"><span class="string" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0);">"Katy Perry"</span></span>);
array_push(<span class="variable" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); color: rgb(181, 137, 0);"><span class="variable" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0);">$fav_bands</span></span>, <span class="string" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); color: rgb(181, 189, 104);"><span class="string" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0);">"Macklemore"</span></span>);

```
```

Another cool array function is `<span class="identifier" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0);"><span class="keymethods" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0);">count</span></span>()`. Passing an array to `<span class="identifier" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0);"><span class="keymethods" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0);">count</span></span>()` will return the number of elements in that array. Like this:

```
<pre style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); color: rgb(197, 200, 198); border-radius: 2px; padding: 7px 10px; font-size: 15px; line-height: 22px; background-color: rgb(35, 44, 49);">
```
<span class="keyword" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); color: rgb(178, 148, 187);"><span class="keyword" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0);">print</span></span> count(<span class="variable" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); color: rgb(181, 137, 0);"><span class="variable" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0);">$fav_bands</span></span>); <span class="comment" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); color: rgb(150, 152, 150); font-style: italic;"><span class="comment" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0);">// prints 5</span></span>
```
```

:::

語系選擇

學校簡介

校長室
 教務處
 學務處
 總務處
 輔導室
 家長會
 媒體報導
 北小臉書
 北小附幼臉書
 課程計畫平台

主選單

地址：521彰化縣北斗鎮文苑路一段32號電話：04-8882008 傳真：04-8871995