PHP简易验证码类
1 <?php
2
3 class authCode
4 {
5 private static $instance = null; #实例对象
6 private $width = 120; #图片宽度
7 private $height = 40; #图片高度
8 private $font = ‘font/elephant.ttf‘; #字体文件路径
9 private $fontSize = 14; #字体大小
10 private $strLen = 6; #字符个数
11 private $auth_code_str = null; #验证码结果
12 private $imgResult = null; #图片资源
13
14 #入口文件 静态方法调用 实例化对象 可用 对象方法调用
15 public static function img()
16 {
17 if (!(self::$instance instanceof self)) {
18 self::$instance = new self();
19 }
20 return self::$instance;
21 }
22
23 #随机颜色
24 private function randomColor($img = null, $min = 0, $max = 255)
25 {
26 $rgb = [];
27 for ($i = 1; $i <= 3; $i++) {
28 $rgb[] = str_pad(rand($min, $max), 3, 0, STR_PAD_LEFT);
29 }
30 return imagecolorallocate($img, $rgb[0], $rgb[1], $rgb[2]);
31 }
32
33 #随机字符串
34 private function randomStr($num = 4)
35 {
36 if ($num > 0) {
37 $string = array_merge(range(‘a‘, ‘z‘), range(0, 9), range(‘A‘, ‘Z‘), range(0, 9));
38 for ($i = 1; $i <= $num; $i++) {
39 shuffle($string);
40 $this->auth_code_str .= array_pop($string);
41 }
42 }
43 return $this;
44 }
45
46 #创建验证码
47 public function createAuthCode(&$codeStr = false)
48 {
49 if (!$this->auth_code_str) {
50 $this->randomStr($this->strLen);
51 }
52
53 if ($codeStr !== false && empty($codeStr)) {
54 $codeStr = $this->auth_code_str;
55 } else if (!empty($codeStr) && $codeStr !== false) {
56 $this->auth_code_str = $codeStr;
57 }
58
59 $this->imgResult = imagecreatetruecolor($this->width, $this->height);
60
61 $background = $this->randomColor($this->imgResult, 200);
62
63 imagefilledrectangle($this->imgResult, 0, 0, $this->width, $this->height, $background);
64
65 $y = ($this->height - $this->fontSize);
66
67 $string = str_split($this->auth_code_str, 1);
68
69 for ($i = 0; $i < count($string); $i++) {
70 $frontColor = $this->randomColor($this->imgResult, 0, 200);
71 imagefttext($this->imgResult, $this->fontSize, rand(0, 10), ($this->fontSize + 2) * $i + 10, $y, $frontColor, $this->font, $string[$i]);
72 }
73 return $this;
74 }
75
76 #生成线
77 public function line($line = 3)
78 {
79 $line = $line ?: 3;
80 for ($i = 1; $i <= $line; $i++) {
81 $lineColor = $this->randomColor($this->imgResult, 0, 200);
82 imageline($this->imgResult, rand(0, $this->width / 5), rand(5, $this->height - 5), rand($this->width / 1.3, $this->width), rand(5, $this->height - 5), $lineColor);
83 }
84 return $this;
85 }
86
87 #噪点
88 public function pixel($num = 50){
89 $num = $num ?: 3;
90 for ($i = 1; $i <= $num; $i++) {
91 $lineColor = $this->randomColor($this->imgResult, 0, 100);
92 imagesetpixel($this->imgResult, rand(0, $this->width), rand(0, $this->height), $lineColor);
93 }
94 return $this;
95 }
96
97 #设置大小
98 public function size($width = null, $height = null)
99 {
100 $this->width = $width ?: 120;
101 $this->height = $height ?: 40;
102 return $this;
103 }
104
105 #设置字体大小
106 public function fontSize($fontsize = 14)
107 {
108 $this->fontSize = $fontsize ?: 14;
109 return $this;
110 }
111
112 #设置字体
113 public function font($file = null)
114 {
115 if (is_null($file) === true) {
116 $this->font = ‘font/elephant.ttf‘;
117 } else {
118 $this->font = $file;
119 }
120 return $this;
121 }
122
123 #设置长度
124 public function strlen($num = null)
125 {
126 $this->strLen = $num ?: 6;
127 return $this;
128 }
129
130 public function display()
131 {
132 ob_end_flush();
133 header("content-type:image/jpeg");
134 imagejpeg($this->imgResult, null, 100);
135 imagedestroy($this->imgResult);
136 exit;
137 }
138 }
139
140 #简单调用方法
141 authCode::img()->createAuthCode()->display();
142
143
144 #指定字符串调用
145 // $string = ‘abc123‘;
146 // authCode::img()->createAuthCode($string)->display();
147
148
149 #设置图片大小、字数、字体大小
150 // authCode::img()->strlen(8)->size(300,100)->fontSize(30)->createAuthCode()->display();
151
152
153 #添加噪点
154 // authCode::img()->createAuthCode()->line()->pixel()->display();
155
156
157 ?>
以上便是关于验证码类的封装过程，可以直接使用。
链接：https://mp.weixin.qq.com/s/7RrGadoaN-If72N30LGEEw
原文地址：https://www.cnblogs.com/clubs/p/11443625.html
时间： 2024-11-10 14:50:37