A beautiful PHP Verification code class (share) font: [Increase decrease] Type: Reproduced below the small series for everyone to share a beautiful PHP code class. Need friends can come over to refer directly to the code:
Copy CodeThe code is as follows:
Verification Code Class
Class Validatecode {
Private $charset = ' abcdefghkmnprstuvwxyzABCDEFGHKMNPRSTUVWXYZ23456789 ';//random factor
private $code;//Verification Code
Private $codelen = 4;//Verification Code length
Private $width = 130;//width
Private $height = 50;//height
private $img;//graphic resource handle
private $font;//The specified font
Private $fontsize = 20;//Specify font size
private $fontcolor;//Specify Font Color
Constructor method Initialization
Public Function __construct () {
$this->font = dirname (__file__). ' /font/elephant.ttf ';//Note that the font path should be written, otherwise the picture will not be displayed
}
Generate Random Code
Private Function Createcode () {
$_len = strlen ($this->charset)-1;
for ($i =0; $i < $this->codelen; $i +) {
$this->code. = $this->charset[mt_rand (0,$_len)];
}
}
Generate background
Private Function Createbg () {
$this->img = Imagecreatetruecolor ($this->width, $this->height);
$color = Imagecolorallocate ($this->img, Mt_rand (157,255), Mt_rand (157,255), Mt_rand (157,255));
Imagefilledrectangle ($this->img,0, $this->height, $this->width,0, $color);
}
Generate text
Private Function CreateFont () {
$_x = $this->width/$this->codelen;
for ($i =0; $i < $this->codelen; $i +) {
$this->fontcolor = imagecolorallocate ($this->img,mt_rand (0,156), Mt_rand (0,156), Mt_rand (0,156));
Imagettftext ($this->img, $this->fontsize,mt_rand ( -30,30), $_x* $i +mt_rand (1,5), $this->height/1.4, $this- >fontcolor, $this->font, $this->code[$i]);
}
}
Generate lines, snowflakes
Private Function Createline () {
Lines
for ($i =0; $i <6; $i + +) {
$color = Imagecolorallocate ($this->img,mt_rand (0,156), Mt_rand (0,156), Mt_rand (0,156));
Imageline ($this->img,mt_rand (0, $this->width), Mt_rand (0, $this->height), Mt_rand (0, $this->width), Mt_ Rand (0, $this->height), $color);
}
Snowflakes
for ($i =0; $i <100; $i + +) {
$color = Imagecolorallocate ($this->img,mt_rand (200,255), Mt_rand (200,255), Mt_rand (200,255));
Imagestring ($this->img,mt_rand (1,5), Mt_rand (0, $this->width), Mt_rand (0, $this->height), ' * ', $color);
}
}
Output
Private Function OutPut () {
Header (' content-type:image/png ');
Imagepng ($this->img);
Imagedestroy ($this->img);
}
External generation
Public Function doimg () {
$this->CREATEBG ();
$this->createcode ();
$this->createline ();
$this->createfont ();
$this->output ();
}
Get Verification Code
Public Function GetCode () {
Return Strtolower ($this->code);
}
}
Output instance:
How to use:
1, first save the verification code class as a file named ValidateCode.class.php;
2. Create a new file named captcha.php to call the class;
captcha.php
Copy CodeThe code is as follows:
Session_Start ();
Require './validatecode.class.php '; First, the class is included and the actual path is modified according to the actual situation.
$_VC = new Validatecode (); Instantiate an Object
$_vc->doimg ();
$_session[' authnum_session ' = $_vc->getcode ();//verification code saved to SESSION
3, refer to the page, the code is as follows:
Copy CodeThe code is as follows:
</img>
4, a complete verification page, the code is as follows:
Copy CodeThe code is as follows:
<?php
Session_Start ();
At the beginning of the page to open the session,
Error_reporting (2047);
Session_destroy ();
Remove the session to get a new session value each time;
With seesion effect is good, also very convenient
?>
<title>session example of photo verification </title>
<style type= "Text/css" >
#login p{
margin-top:15px;
line-height:20px;
font-size:14px;
Font-weight:bold;
}
#login img{
Cursor:pointer;
}
form{
margin-left:20px;
}
</style>
<body>
<form id= "Login" action= "method=" POST ">
<p> This example is the session validation instance </p>
<p>
<span> Verification Code:</span>
<input type= "text" name= "Validate" value= "size=10>
</img>
</p>
<p>
<input type= "Submit" >
</p>
</form>
<?php
Print the previous session;
echo "Last Session:<b>". $_session["Authnum_session"]. " </b><br> ";
$validate = "";
if (Isset ($_post["Validate")) {
$validate =$_post["Validate"];
echo "You have just entered:". $_post["Validate"]. " <br> Status: ";
if ($validate!=$_session["Authnum_session"]) {
Determine if the session value is consistent with the user input verification code;
echo "<font color=red> input error </font>";
}else{
echo "<font color=green> through verification </font>";
}
}
?>
A nice PHP verification code class
