# PHP随机图片API的实现

> 原理很简单，图片url放在一个txt里，php读取txt并随机输出一行的文本或跳转到该地址即可。
>

### 代码如下：

#### 读取文件，随机取一行

```php
<?php
//获取当前绝对路径
$path = dirname(__FILE__);
//读取文本文件
$file = file($path."/1.txt");
//随机选择一行作为url
$line = mt_rand(0, count($file)-1);
$url = trim($file[$line]);
```
#### 只输出url文本

```php
echo $url
```

#### 直接303跳转到url

```php
//303跳转
if (isset($url))
{
Header("HTTP/1.1 303 See Other");
Header("Location: $url");
exit;
}
?>
```

### 示例demo：

- 获取随机链接地址：[http://api.aya1.xyz:6](http://api.aya1.xyz:6)
- 直接随机303跳转：[http://api.aya1.xyz:6/random.php](http://api.aya1.xyz:6/random.php)

***

### Javascript实现随机加载图片

那么不使用php，能否实现随机图片呢？

完全可以！（虽然方法很蠢并且图片真实地址不好获取）

创建一个包含图片地址的列表，然后随机选择一个元素输出即可

```js
<script type="text/javascript">
    var arr = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255,256,257,258,259,260,261,262,263,264,265,266,267,268,269,270,271,272,273,274,275,276,277,278,279,280,281,282,283,284,285,286,287,288,289,290,291,292,293,294,295,296,297,298,299,300,301,302,303,304,305,306,307,308,309,310,311,312,313,314,315,316,317,318,319,320,321,322,323,324,325,326,327,328,329,330,331,332,333,334,335,336,337,338,339,340,341,342,343,344,345,346,347,348,349,350,351,352,353,354,355,356,357,358,359,360,361,362,363,364,365,366,367,368,369,370,371,372,373,374,375,376,377,378,379,380,381,382,383,384,385,386,387,388,389,390,391,392,393,394,395,396,397,398,399,400,401,402,403,404,405,406,407,408,409,410,411,412,413,414,415,416,417,418,419,420,421,422,423,424,425,426,427,428,429,430,431,432,433,434,435,436,437,438,439,440,441,442,443,444,445,446,447,448,449,450,451,452,453,454,455,456,457,458,459,460,461,462,463,464,465,466,467,468,469,470,471,472,473,474,475,476,477,478,479,480,481,482,483,484,485,486,487,488,489,490,491,492,493,494,495,496,497,498,499,500,501,502,503,504,505,506,507,508,509,510,511,512,513,514,515,516,517,518,519,520,521,522,523,524,525,526,527,528,529,530,531,532,533,534,535,536,537,538,539,540,541,542,543,544,545,546,547,548,549,550,551,552,553,554,555,556,557,558,559,560,561,562,563,564,565,566,567,568,569,570,571,572,573,574,575,576,577,578,579,580,581];
    var imgurl= 'http://brx86.gitee.io/kemomimi/' + arr[Math.floor(Math.random()*arr.length)] + '.jpg';
    document.write('<img src="'+imgurl+'">');
</script>
```

#### 示例demo：

- 刷新随机加载图片：[http://brx86.gitee.io/kemomimi](http://brx86.gitee.io/kemomimi)