PHP字符类

1 2 # ============================
3 # Filename: string.class.php
4 # Note : 字符串管理
5 # Update : 2008-5-8
6 # Cool!!
7 # ============================
8 class QG_C_STRING
9 {
10 var $script = false ;
11 var $iframe = false ;
12 var $style = false ;
13
14 function __construct( $script = false , $iframe = false , $style = false )
15 {
16 $this -> script = $script ;
17 $this -> iframe = $iframe ;
18 $this -> style = $style ;
19 }
20
21 # [兼容PHP4]
22 function QG_C_STRING( $script = false , $iframe = false , $style = false )
23 {
24 $this -> __construct( $script , $iframe , $style );
25 }
26
27 function __destruct()
28 {
29 return true ;
30 }
31
32 # [设置状态属性]
33 function set( $var , $status )
34 {
35 $this -> $var = $status ;
36 }
37
38 function safe( $msg )
39 {
40 if ( ! $msg )
41 {
42 return false ;
43 }
44 if ( is_array ( $msg ))
45 {
46 foreach ( $msg AS $key => $value )
47 {
48 $msg [ $key ] = $this -> safe( $value );
49 }
50 }
51 else
52 {
53 $msg = trim ( $msg );
54 $old = array ( " & " , " " , " ' " , ' " ' , " < " , " > " , " \t " , " \r " );
55 $new = array ( " & " , " " , " ' " , " " " , " < " , " > " , " " , "" );
56 $msg = str_replace ( $old , $new , $msg );
57 $msg = str_replace ( " " , " " , $msg );
58 $old = array ( " //isU " , " //isU " , " /<\/fram(.*)>/isU " , " //isU " , " /<\/ifram(.*)>/isU " , " //isU " );
59 $new = array ( "" , "" , "" , "" , "" , "" );
60 $msg = preg_replace ( $old , $new , $msg );
61 }
62 return $msg ;
63 }
64
65 function html( $msg )
66 {
67 if ( is_array ( $msg ))
68 {
69 foreach ( $msg AS $key => $value )
70 {
71 $msg [ $key ] = $this -> html( $value );
72 }
73 }
74 else
75 {
76 $msg = trim ( $msg );
77 $msg = stripslashes ( $msg );
78 if ( ! $this -> script)
79 {
80 $msg = preg_replace ( " //isU " , "" , $msg );
81 }
82 if ( ! $this -> iframe)
83 {
84 $msg = preg_replace ( " //isU " , "" , $msg );
85 $msg = preg_replace ( " /<\/fram(.*)>/isU " , "" , $msg );
86 $msg = preg_replace ( " //isU " , "" , $msg );
87 $msg = preg_replace ( " /<\/ifram(.*)>/isU " , "" , $msg );
88 }
89 if ( ! $this -> style)
90 {
91 $msg = preg_replace ( " //isU " , "" , $msg );
92 }
93 # [超链接在新窗口打开]
94 $msg = preg_replace ( " //isU","",$msg);
95 $msg = preg_replace("//isU","",$msg);
96 #[替换网址]
97 $url = $this->get_url();
98 $msg = str_replace($url,"",$msg);
99 $msg = addslashes($msg);
100 }
101 return $msg;
102 }
103
104 #[截取字符长度，仅支持UTF-8]
105 function cut($string,$length,$dot="…")
106 {
107 if(strlen($string) <= $length)
108 {
109 return $string;
110 }
111 $strcut = '' ;
112 $n = $tn = $noc = 0;
113 while ($n < strlen($string))
114 {
115 $t = ord($string[$n]);
116 if($t == 9 || $t == 10 || (32 <= $t && $t <= 126))
117 {
118 $tn = 1; $n++; $noc++;
119 }
120 elseif(194 <= $t && $t <= 223)
121 {
122 $tn = 2; $n += 2; $noc += 2;
123 }
124 elseif(224 <= $t && $t < 239)
125 {
126 $tn = 3; $n += 3; $noc += 2;
127 }
128 elseif(240 <= $t && $t <= 247)
129 {
130 $tn = 4; $n += 4; $noc += 2;
131 }
132 elseif(248 <= $t && $t <= 251)
133 {
134 $tn = 5; $n += 5; $noc += 2;
135 }
136 elseif($t == 252 || $t == 253)
137 {
138 $tn = 6; $n += 6; $noc += 2;
139 }
140 else
141 {
142 $n++;
143 }
144
145 if ($noc >= $length)
146 {
147 break;
148 }
149 }
150 if ($noc > $length)
151 {
152 $n -= $tn;
153 }
154 $strcut = substr($string, 0, $n);
155 return $strcut.$dot;
156 }
157
158 #[编码转换，使用PHP里的iconv功能]
159 function charset($msg, $s_code="UTF-8", $e_code="GBK")
160 {
161 if(!$msg)
162 {
163 return false;
164 }
165 if(is_array($msg))
166 {
167 foreach($msg AS $key=>$value)
168 {
169 $msg[$key] = $this->charset($value,$s_code,$e_code);
170 }
171 }
172 else
173 {
174 if(function_exists("iconv"))
175 {
176 $msg = iconv($s_code,$e_code,$msg);
177 }
178 }
179 return $msg;
180 }
181
182 function format($msg,$f=false)
183 {
184 $status = get_magic_quotes_gpc();
185 if(!$status || $f)
186 {
187 if(is_array($msg))
188 {
189 foreach($msg AS $key=>$value)
190 {
191 $msg[$key] = $this->format($value,$f);
192 }
193 }
194 else
195 {
196 $msg = addslashes($msg);
197 }
198 }
199 return $msg;
200 }
201
202 function num_format($a,$ext=2)
203 {
204 if(!$a || $a == 0)
205 {
206 return false;
207 }
208 if($a <= 1024)
209 {
210 $a = "1 KB";
211 }
212 elseif($a>1024 && $a<(1024*1024))
213 {
214 $a = round(($a/1024),$ext)." KB";
215 }
216 elseif($a>=(1024*1024) && $a<(1024*1024*1024))
217 {
218 $a = round(($a/(1024*1024)),$ext)." MB";
219 }
220 else
221 {
222 $a = round(($a/(1024*1024*1024)),$ext)." GB";
223 }
224 return $a;
225 }
226
227 function get_url()
228 {
229 $myurl = "http://".str_replace("http://","",$_SERVER["SERVER_NAME"]);
230 $docu = $_SERVER["PHP_SELF"];
231 $array = explode("/",$docu);
232 $count = count($array);
233 if($count>1)
234 {
235 foreach($array AS $key=>$value)
236 {
237 $value = trim($value);
238 if($value)
239 {
240 if(($key+1) < $count)
241 {
242 $myurl .= "/".$value;
243 }
244 }
245 }
246 }
247 $myurl .= "/";
248 return $myurl;
249 }
250 }
251 ?>