| <?php
Class code{ 1. Define members with wide, high, canvas, Word, type, painting type Private $width; Width
Private $height; Height
Private $num; Verification code number of words
Private $imgType; Build picture Type
Private $Type; String type 1,2,3 three options 1 pure digit 2 Pure Small Letter 3 Case number mixed
Private $HB; Canvas
Public $codestr; Verifying Code strings Public function __construct ($height =20, $num =4, $imgType = "jpeg", $Type =1) {
$this->width = $num *20;
$this->height = $height;
$this->num = $num;
$this->imgtype = $imgType;
$this->type = $Type;
$this->codestr = $this->codestr ();
$this->zuhe ();
} 2. To define a random fetch string function
Private Function Codestr () {
Switch ($this->type) { Case 1://Type 1 get 1-9 random number
$str = Implode ("", Array_rand (range (0,9), $this->num));
Break
Case 2://Type 2 get a-Z random lowercase letter
$str = Implode ("", Array_rand (Array_flip (range (a,z)), $this->num));
Break
Case 3://Type 3 get number, lowercase letter, uppercase mixed
For ($i =0 $i < $this->num; $i + +) {
$m = rand (0,2);
Switch ($m) {
Case 0:
$o = rand (48,57);
Break
Case 1:
$o = rand (65,90);
Break
Case 2:
$o = rand (97,122);
Break
}
$str. = sprintf ("%c", $o);
}
Break
}
return $str;
}
3. Initializing Canvas image Resources
Private Function Hb () {
$this->HB = Imagecreatetruecolor ($this->width, $this->height);
}
4. Generate Background color
Private Function Bg () {
Return Imagecolorallocate ($this->hb,rand (130,250), Rand (130,250), Rand (130,250));
} 5. Generate Font Color
Private Function Font () {
Return Imagecolorallocate ($this->hb,rand (0,100), Rand (0,100), Rand (0,100));
} 6. Fill background color
Private function bgcolor () {
Imagefilledrectangle ($this->hb,0,0, $this->width, $this->height, $this->bg ());
} 7. Jamming Point
Private Function Ganrao () {
$sum =floor (($this->width) * ($this->height)/3);
for ($i =0; $i < $sum; $i + +) {
Imagesetpixel ($this->hb,rand (0, $this->width), rand (0, $this->height), $this->BG ());
}
} 8. Random Straight line Arc
Private Function Huxian () {
For ($i =0 $i < $this->num; $i + +) {
Imagearc ($this->hb,rand (0, $this->width), rand (0, $this->height), rand (0, $this->width), rand (0, $this- >height), Rand (0,360), Rand (0,360), $this->BG ());
}
} 9. Write
Private Function Xiezi () {
For ($i =0 $i < $this->num; $i + +) {
$x =ceil ($this->width/$this->num) * $i;
$y =rand (1, $this->height-15);
Imagechar ($this->hb,5, $x +4, $y, $this->codestr[$i], $this->font ());
}
} 10. Output
Private Function outimg () {
$shuchu = "image". $this->imgtype;
$header = "content-type:image/". $this->imgtype;
if (function_exists ($shuchu)) {
Header ($header);
$shuchu ($this->HB);
}else{
Exit ("No such image in GD Library");
}
} 11. Assembling
Private Function Zuhe () {
$this->HB ();
$this->bgcolor ();
$this->ganrao ();
$this->huxian ();
$this->xiezi ();
$this->outimg ();
} Public Function Getcodestr () {
return $this->codestr;
}
}
?> |
