1 | <?php |
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2 | // +----------------------------------------------------------------------+ |
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3 | // | PHP Version 4 | |
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4 | // +----------------------------------------------------------------------+ |
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5 | // | Copyright (c) 1997-2004 The PHP Group | |
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6 | // +----------------------------------------------------------------------+ |
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7 | // | This source file is subject to version 3.0 of the PHP license, | |
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8 | // | that is bundled with this package in the file LICENSE, and is | |
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9 | // | available at through the world-wide-web at | |
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10 | // | http://www.php.net/license/3_0.txt. | |
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11 | // | If you did not receive a copy of the PHP license and are unable to | |
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12 | // | obtain it through the world-wide-web, please send a note to | |
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13 | // | license@php.net so we can mail you a copy immediately. | |
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14 | // +----------------------------------------------------------------------+ |
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15 | // | Authors: Aidan Lister <aidan@php.net> | |
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16 | // +----------------------------------------------------------------------+ |
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17 | // |
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18 | // $Id: str_split.php,v 1.15 2005/06/18 12:15:32 aidan Exp $ |
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19 | |
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20 | |
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21 | /** |
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22 | * Replace str_split() |
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23 | * |
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24 | * @category PHP |
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25 | * @package PHP_Compat |
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26 | * @link http://php.net/function.str_split |
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27 | * @author Aidan Lister <aidan@php.net> |
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28 | * @version $Revision: 1.15 $ |
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29 | * @since PHP 5 |
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30 | * @require PHP 4.0.0 (user_error) |
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31 | */ |
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32 | if (!function_exists('str_split')) { |
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33 | function str_split($string, $split_length = 1) |
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34 | { |
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35 | if (!is_scalar($split_length)) { |
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36 | user_error('str_split() expects parameter 2 to be long, ' . |
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37 | gettype($split_length) . ' given', E_USER_WARNING); |
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38 | return false; |
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39 | } |
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40 | |
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41 | $split_length = (int) $split_length; |
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42 | if ($split_length < 1) { |
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43 | user_error('str_split() The length of each segment must be greater than zero', E_USER_WARNING); |
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44 | return false; |
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45 | } |
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46 | |
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47 | // Select split method |
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48 | if ($split_length < 65536) { |
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49 | // Faster, but only works for less than 2^16 |
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50 | preg_match_all('/.{1,' . $split_length . '}/s', $string, $matches); |
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51 | return $matches[0]; |
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52 | } else { |
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53 | // Required due to preg limitations |
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54 | $arr = array(); |
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55 | $idx = 0; |
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56 | $pos = 0; |
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57 | $len = strlen($string); |
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58 | |
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59 | while ($len > 0) { |
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60 | $blk = ($len < $split_length) ? $len : $split_length; |
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61 | $arr[$idx++] = substr($string, $pos, $blk); |
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62 | $pos += $blk; |
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63 | $len -= $blk; |
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64 | } |
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65 | |
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66 | return $arr; |
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67 | } |
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68 | } |
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69 | } |
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70 | |
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71 | ?> |
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