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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