PHP implements a replacement sensitive string class instance _php tutorial

PHP implements an instance of replacing a sensitive string class

The StrFilter.class.php class file is as follows:

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21st 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115

/** String Filter Class * date:2013-01-09 * Author:fdipzone * ver:v1.0 * * Func: * Public replace replaces illegal characters * Public check Check to see if illegal characters are included * Private protect_white_list protection Whitelist * Private resume_white_list Restore white list * Private getval Whitelist key converted to value */ Class strfilter{//Class start Private $_white_list = Array (); Private $_black_list = Array (); Private $_replacement = ' * '; Private $_ltag = ' [[# # '; Private $_rtag = ' # #]] '; /** * @param Array $white _list * @param Array $black _list * @param String $replacement */ Public function __construct ($white _list=array (), $black _list=array (), $replacement = ' * ') { $this->_white_list = $white _list; $this->_black_list = $black _list; $this->_replacement = $replacement; } /** replacing illegal characters * @param string $content to swap * string replaced by @return strings */ Public function Replace ($content) { if (!isset ($content) | | $content = = ") { Return '; } Protect White List $content = $this->protect_white_list ($content); Replace Black List if ($this->_black_list) { foreach ($this->_black_list as $val) { $content = Str_replace ($val, $this->_replacement, $content); } } Resume White List $content = $this->resume_white_list ($content); return $content; } /** check for illegal self-characters * @param string $content strings * @return Boolean */ Public function Check ($content) { if (!isset ($content) | | $content = = ") { return true; } Protect White List $content = $this->protect_white_list ($content); Check if ($this->_black_list) { foreach ($this->_black_list as $val) { if (Strstr ($content, $val)! = ") { return false; } } } return true; } White List of/** protection * @param string $content strings * @return String */ Private Function Protect_white_list ($content) { if ($this->_white_list) { foreach ($this->_white_list as $key = + $val) { $content = Str_replace ($val, $this->_ltag. $key. $this->_rtag, $content); } } return $content; } /** to restore white list * @param String $content * @return String */ Private Function Resume_white_list ($content) { if ($this->_white_list) { $content = Preg_replace_callback ("/\[\[## (. *?) ##\]\].*?/si ", Array ($this, ' getval '), $content); } return $content; } /** White list key reverts to value * @param Array $matches match white_list Key * @return String white_list val */ Private Function Getval ($matches) { return Isset ($this->_white_list[$matches [1]])? $this->_white_list[$matches [1]]: '; Key->val } }//Class end ?>

The demo sample is as follows:

1 2 3 4 5 6 7 8 9 10 11 12 13

Header ("Content-type:text/html;charset=utf8"); Require ("StrFilter.class.php"); $white = array (' Cock silk ', ' Caocao '); $black = array (' Cock ', ' fuck '); $content = "I fuck, you are a dick, I dick You"; $obj = new Strfilter ($white, $black); echo $obj->replace ($content); ?>

http://www.bkjia.com/PHPjc/882702.html www.bkjia.com true http://www.bkjia.com/PHPjc/882702.html techarticle PHP implements a replacement sensitive string class instance of the StrFilter.class.php class file as follows: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 It's a ...

