46 lines
1.2 KiB
PHP
Executable File
46 lines
1.2 KiB
PHP
Executable File
<?php
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namespace App\Traits;
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trait RandomTrait {
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public function generateRandomKey() {
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$rand = random_int( PHP_INT_MIN, PHP_INT_MAX );
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return str_shuffle( md5( $rand ) . $rand . $this->random_str() );
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}
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/**
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* Generate a random string, using a cryptographically secure
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* pseudorandom number generator (random_int)
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*
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* This function uses type hints now (PHP 7+ only), but it was originally
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* written for PHP 5 as well.
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*
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* For PHP 7, random_int is a PHP core function
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* For PHP 5.x, depends on https://github.com/paragonie/random_compat
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*
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* @param int $length How many characters do we want?
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* @param string $keyspace A string of all possible characters
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* to select from
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*
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* @return string
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*/
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public function random_str(
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int $length = 64,
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string $keyspace = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
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): string {
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if ( $length < 1 ) {
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throw new RangeException( "Length must be a positive integer" );
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}
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$pieces = [];
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$max = mb_strlen( $keyspace, '8bit' ) - 1;
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for ( $i = 0 ; $i < $length ; ++ $i ) {
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$pieces [] = $keyspace[ random_int( 0, $max ) ];
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}
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return implode( '', $pieces );
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}
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}
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