Rumah > php教程 > php手册 > PHP关联数组的具体使用方法

PHP关联数组的具体使用方法

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB
Lepaskan: 2016-06-13 11:06:18
asal
1334 orang telah melayarinya

我们在操作数据库的时候,需要用到下面我们看一个基本的数字格式的数组遍历:

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

<ol class="dp-xml">

<li class="alt"><span><strong><font color="#006699"><span class="tag"></span><span class="tag-name">php</span></font></strong><span>   </span></span></li>

<li class=""><span>$temp[0] = "richmond";   </span></li>

<li class="alt"><span>$temp[1] = "tigers";   </span></li>

<li class=""><span>$temp[2] = "premiers";   </span></li>

<li class="alt"><span> </span></li>

<li class="">

<span>for($</span><span class="attribute"><font color="#ff0000">x</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">0</font></span><span>;$x</span><strong><font color="#006699"><span class="tag"><span class="tag-name">count</span></span></font></strong><span>($temp);$x++)   </span>

</li>

<li class="alt"><span>{   </span></li>

<li class=""><span>echo $temp[$x];   </span></li>

<li class="alt"><span>echo " ";   </span></li>

<li class=""><span>}   </span></li>

<li class="alt">

<span></span><span class="tag"><strong><font color="#006699">?></font></strong></span><span>   </span>

</li>

</ol>

Salin selepas log masuk

然而另外一种更加节省代码的方式是:

1

2

3

4

5

6

7

8

9

10

11

<ol class="dp-xml">

<li class="alt"><span><strong><font color="#006699"><span class="tag"></span><span class="tag-name">php</span></font></strong><span>   </span></span></li>

<li class="">

<span>$</span><span class="attribute"><font color="#ff0000">temp</font></span><span> = </span><span class="attribute-value"><font color="#0000ff">array</font></span><span>("richmond""tigers""premiers");   </span>

</li>

<li class="alt"><span>foreach ($temp as $element)   </span></li>

<li class=""><span>echo "$element ";   </span></li>

<li class="alt">

<span></span><span class="tag"><strong><font color="#006699">?></font></strong></span><span>   </span>

</li>

</ol>

Salin selepas log masuk

foreach 还能输出文字下标:

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

<ol class="dp-xml">

<li class="alt"><span><strong><font color="#006699"><span class="tag"></span><span class="tag-name">php</span></font></strong><span>   </span></span></li>

<li class="">

<span>$</span><span class="attribute"><font color="#ff0000">temp</font></span><span> = </span><span class="attribute-value"><font color="#0000ff">array</font></span><span>("club" =</span><span class="tag"><strong><font color="#006699">></font></strong></span><span> "richmond",   </span>

</li>

<li class="alt">

<span>"nickname" =</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>"tigers",   </span>

</li>

<li class="">

<span>"aim" =</span><span class="tag"><strong><font color="#006699">></font></strong></span><span> "premiers");   </span>

</li>

<li class="alt"><span> </span></li>

<li class="">

<span>foreach ($temp as $</span><span class="attribute"><font color="#ff0000">key</font></span><span> =</span><span class="tag"><strong><font color="#006699">></font></strong></span><span> $value)   </span>

</li>

<li class="alt"><span>echo "$key : $value ";   </span></li>

<li class="">

<span></span><span class="tag"><strong><font color="#006699">?></font></strong></span><span>   </span>

</li>

</ol>

Salin selepas log masuk

以上就是PHP关联数组在数据库中的相关使用方法。


Kenyataan Laman Web ini
Kandungan artikel ini disumbangkan secara sukarela oleh netizen, dan hak cipta adalah milik pengarang asal. Laman web ini tidak memikul tanggungjawab undang-undang yang sepadan. Jika anda menemui sebarang kandungan yang disyaki plagiarisme atau pelanggaran, sila hubungi admin@php.cn
Cadangan popular
Tutorial Popular
Lagi>
Muat turun terkini
Lagi>
kesan web
Kod sumber laman web
Bahan laman web
Templat hujung hadapan