PHP 快速创建数组

拼搏现实的明天。 2023-07-20 15:58 3阅读 0赞

1.应用场景

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 <td>用于快速创建php数组，或者为了调试 或者 其他。</td> 
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2.学习/操作

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 <td> 方式有哪些？ 方式一： range() 函数 //常用于一维数组 
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 &lt;?php // array(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12) foreach (range(0, 12) as $number) { &nbsp;&nbsp;&nbsp; echo $number; } 
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 //&nbsp; step 参数 // array(0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100) foreach (range(0, 100, 10) as $number) { &nbsp;&nbsp;&nbsp; echo $number; } 
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 // 字符序列的使用 // array('a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i'); foreach (range('a', 'i') as $letter) { &nbsp;&nbsp;&nbsp; echo $letter; } 
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 // array('c', 'b', 'a'); foreach (range('c', 'a') as $letter) { &nbsp;&nbsp;&nbsp; echo $letter; } ?&gt; 
 </blockquote> 详细见：<a href="https://www.php.net/manual/zh/function.range.php" rel="nofollow">https://www.php.net/manual/zh/function.range.php</a> &nbsp; &nbsp; 方式二：//推荐 &lt;?php //目标: 构造一个m列n维数组 //思路: function constructArray($m, $n)&nbsp;&nbsp; &nbsp; { &nbsp;&nbsp; &nbsp;$array = []; &nbsp;&nbsp; &nbsp; &nbsp;&nbsp; &nbsp;for($i = 0; $i &lt; $m; $i++){ &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;for($j = 0; $j &lt; $n; $j++){ &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;$element = ''; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;$num = rand(1,4); &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;for($k = 0; $k &lt; $num; $k++){ &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;$element .= chr(rand(97, 122)); &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;//echo $element; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;//echo "&lt;br&gt;"; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;//97~122是小写的英文字母 &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;//65~90是大写的 &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;} &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;$array[$i][$j] = $element; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;} &nbsp;&nbsp; &nbsp;} &nbsp;&nbsp; &nbsp; &nbsp;&nbsp; &nbsp;return $array; } &nbsp; //打印 $dump = function ($var){ &nbsp;&nbsp; &nbsp;echo '&lt;pre&gt;'; // This is for correct handling of newlines &nbsp;&nbsp; &nbsp;ob_start(); &nbsp;&nbsp; &nbsp;var_dump($var); &nbsp;&nbsp; &nbsp;$a=ob_get_contents(); &nbsp;&nbsp; &nbsp;ob_end_clean(); &nbsp;&nbsp; &nbsp;echo htmlspecialchars($a,ENT_QUOTES); // Escape every HTML special chars (especially &gt; and &lt; ) &nbsp;&nbsp; &nbsp;echo '&lt;/pre&gt;'; }; $data = constructArray(6, 5); $dump($data); &nbsp; 打印结果： <img alt="" height="1004" src="https://img-blog.csdnimg.cn/20200402132248163.png" width="286"> &nbsp; &nbsp; &nbsp; 后续补充 ... </td> 
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3.问题/补充

4.参考

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 <td> <a href="https://blog.csdn.net/william_n/article/details/102911288" rel="nofollow">https://blog.csdn.net/william_n/article/details/102911288</a>&nbsp; //PHP 代码调试 <a href="https://www.php.net/manual/zh/function.range.php" rel="nofollow">https://www.php.net/manual/zh/function.range.php</a> </td> 
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后续补充

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