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Experience in obtaining random numbers with PHP_PHP tutorial

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Release： 2016-07-15 13:33:43
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Function:

Get a random string

PHP gets a random number Parameters:

1, (int)$length = 32 #Random character length
2, (int)$mode = 0 #Random character type, 0 is uppercase and lowercase English and numbers, 1 are numbers, 2 is lowercase letters, 3 is uppercase letters, 4 is uppercase and lowercase letters, 5 is uppercase letters and numbers, 6 is lowercase letters and numbers

PHP gets the random number definition class code

<ol class="dp-xml"><li class="alt"><span><span class="tag"><</span><span> ?php   </span></span></li><li><span>class getRandstrClass   </span></li><li class="alt"><span>{   </span></li><li><span>function getCode ($</span><span class="attribute">length</span><span> = </span><span class="attribute-value">32</span><span>, $</span><span class="attribute">mode</span><span> = </span><span class="attribute-value">0</span><span>)   </span></li><li class="alt"><span>{   </span></li><li><span>switch ($mode) {   </span></li><li class="alt"><span>case '1':   </span></li><li><span>$</span><span class="attribute">str</span><span> = </span><span class="attribute-value">'1234567890'</span><span>;   </span></li><li class="alt"><span>break;   </span></li><li><span>case '2':   </span></li><li class="alt"><span>$</span><span class="attribute">str</span><span> = </span><span class="attribute-value">'abcdefghijklmnopqrstuvwxyz'</span><span>;   </span></li><li><span>break;   </span></li><li class="alt"><span>case '3':   </span></li><li><span>$</span><span class="attribute">str</span><span> = </span><span class="attribute-value">'ABCDEFGHIJKLMNOPQRSTUVWXYZ'</span><span>;   </span></li><li class="alt"><span>break;   </span></li><li><span>case '4':   </span></li><li class="alt"><span>$</span><span class="attribute">str</span><span> = </span><span class="attribute-value">'ABCDEFGHIJKLMNOPQRSTUVWXYZa<br />bcdefghijklmnopqrstuvwxyz'</span><span>;break;   </span></li><li><span>case '5':   </span></li><li class="alt"><span>$</span><span class="attribute">str</span><span> = </span><span class="attribute-value">'ABCDEFGHIJKLMNOPQRSTUVWXY<br />Z1234567890'</span><span>;   </span></li><li><span>break;   </span></li><li class="alt"><span>case '6':   </span></li><li><span>$</span><span class="attribute">str</span><span> = </span><span class="attribute-value">'abcdefghijklmnopqrstuvwxyz<br />1234567890'</span><span>;   </span></li><li class="alt"><span>break;   </span></li><li><span>default:   </span></li><li class="alt"><span>$</span><span class="attribute">str</span><span> = </span><span class="attribute-value">'ABCDEFGHIJKLMNOPQRSTUVWXYZa<br />bcdefghijklmnopqrstuvwxyz1234567890'</span><span>;   </span></li><li><span>break;   </span></li><li class="alt"><span>}   </span></li><li><span>$</span><span class="attribute">randString</span><span> = </span><span class="attribute-value">''</span><span>;   </span></li><li class="alt"><span>$</span><span class="attribute">len</span><span> = </span><span class="attribute-value">strlen</span><span>($str)-1;   </span></li><li><span>for($</span><span class="attribute">i</span><span> = </span><span class="attribute-value">0</span><span>;$i </span><span class="tag"><</span><span> $length;$i ++){   </span></li><li class="alt"><span>$</span><span class="attribute">num</span><span> = </span><span class="attribute-value">mt_rand</span><span>(0, $len);   </span></li><li><span>$randString </span><span class="attribute">.</span><span>= $str[$num];   </span></li><li class="alt"><span>}   </span></li><li><span>return $randString ;   </span></li><li class="alt"><span>}   </span></li><li><span>}   </span></li><li class="alt"><span class="tag">?></span><span>  </span></span></li></ol>
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Instructions for using PHP to obtain random numbers:

1. Save the above code as random.php
2. Introduce random into the required page .php

<ol class="dp-xml"><li class="alt"><span><span class="tag"><</span><span> ?php   </span></span></li><li><span>require_once('random.php');   </span></li><li class="alt"><span class="tag">?></span><span>  </span></span></li></ol>
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3. Use the previously defined class 

<ol class="dp-xml">
<li class="alt"><span><span class="tag"><</span><span> ?php   </span></span></li><li><span>$</span><span class="attribute">code</span><span> = </span><span class="attribute-value">new</span><span> getRandstrClass();   </span></li><li class="alt"><span>$</span><span class="attribute">length</span><span> = </span><span class="attribute-value">32</span><span>;   </span></li><li><span>$</span><span class="attribute">mode</span><span> = </span><span class="attribute-value">0</span><span>;   </span></li><li class="alt"><span>$</span><span class="attribute">str</span><span> = $code-</span><span class="tag">></span><span>getCode($length, $mode);   </span></span></li>
<li><span>echo $str;   </span></li>
<li class="alt">
<span class="tag">?></span><span>   </span>
</li>
</ol>
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The above are all the application methods for obtaining random numbers in PHP.


www.bkjia.comtruehttp: //www.bkjia.com/PHPjc/446045.htmlTechArticleFunction: Get a random string Parameters for PHP to get a random number: 1. (int)$length = 32 #Random Character length 2, (int)$mode = 0 #Random character type, 0 is uppercase and lowercase English and numbers, 1 is number...
Related labels：
int length php effect parameter character string of Obtain random random number
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