本文實例講述了php實現的驗證碼文件類。分享給大家供大家參考。具體如下：
|
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
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
116
117
118
|
<?php/*** @file* @version 1.0* @author 網海浪子* @brief 驗證碼文件類**/class CCheckCodeFile{//驗證碼位數private $mCheckCodeNum = 4;//產生的驗證碼private $mCheckCode = '';//驗證碼的圖片private $mCheckImage = '';//干擾像素private $mDisturbColor = '';//驗證碼的圖片寬度private $mCheckImageWidth = '80';//驗證碼的圖片寬度private $mCheckImageHeight = '20';/**** @brief 輸出頭**/private function OutFileHeader(){ header ("Content-type: image/png");}/**** @brief 產生驗證碼**/private function CreateCheckCode(){ $this->mCheckCode = strtoupper(substr(md5(rand()),0,$this->mCheckCodeNum)); return $this->mCheckCode;} /**** @brief 產生驗證碼圖片**/private function CreateImage(){ $this->mCheckImage = @imagecreate ($this->mCheckImageWidth,$this->mCheckImageHeight); imagecolorallocate ($this->mCheckImage, 200, 200, 200); return $this->mCheckImage;}/**** @brief 設置圖片的干擾像素**/private function SetDisturbColor(){ for ($i=0;$i<=128;$i++) { $this->mDisturbColor = imagecolorallocate ($this->mCheckImage, rand(0,255), rand(0,255), rand(0,255)); imagesetpixel($this->mCheckImage,rand(2,128),rand(2,38),$this->mDisturbColor); }}/**** @brief 設置驗證碼圖片的大小** @param $width 寬** @param $height 高**/public function SetCheckImageWH($width,$height){ if($width==''||$height=='')return false; $this->mCheckImageWidth = $width; $this->mCheckImageHeight = $height; return true;}/**** @brief 在驗證碼圖片上逐個畫上驗證碼**/private function WriteCheckCodeToImage(){ for ($i=0;$i<=$this->mCheckCodeNum;$i++) { $bg_color = imagecolorallocate ($this->mCheckImage, rand(0,255), rand(0,128), rand(0,255)); $x = floor($this->mCheckImageWidth/$this->mCheckCodeNum)*$i; $y = rand(0,$this->mCheckImageHeight-15); imagechar ($this->mCheckImage, 5, $x, $y, $this->mCheckCode[$i], $bg_color); }}/**** @brief 輸出驗證碼圖片**/public function OutCheckImage(){ $this ->OutFileHeader(); $this ->CreateCheckCode(); $this ->CreateImage(); $this ->SetDisturbColor(); $this ->WriteCheckCodeToImage(); imagepng($this->mCheckImage); imagedestroy($this->mCheckImage);}}$c_check_code_image = new CCheckCodeFile();//$c_check_code_image ->SetCheckImageWH(100,50);//設置顯示驗證碼圖片的尺寸$c_check_code_image ->OutCheckImage();?> |
希望本文所述對大家的php程序設計有所幫助。
