blocks|key|2140277|text|一个简单的PHP验证码脚本|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2140278|<?php

session_start();
include("captcha.php");
$_SESSION['captcha']+=+captcha();

echo+'<img+src="'+.+$_SESSION['captcha']['image_src']+.+'"+alt="CAPTCHA"+/>';

?>|code-block|syntax|javascript|2140279|更多-+http://www.abeautifulsite.net/blog/2011/01/a-simple-php-captcha-script/|offset|length|2140280|entityMap|0|LINK|mutability|MUTABLE|url|http://www.abeautifulsite.net/blog/2011/01/a-simple-php-captcha-script/^0|0|0|4|1Z|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

A Simple PHP CAPTCHA Script

<pre><code>&lt;?php

session_start();
include("captcha.php");
$_SESSION['captcha'] = captcha();

echo '&lt;img src="' . $_SESSION['captcha']['image_src'] . '" alt="CAPTCHA" /&gt;';

?&gt;
</code></pre>

more- <a href="http://www.abeautifulsite.net/blog/2011/01/a-simple-php-captcha-script/" rel="nofollow">http://www.abeautifulsite.net/blog/2011/01/a-simple-php-captcha-script/</a>

blocks|key|1063803|text|验证码生成代码|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1063804|captcha.php：|1063805|$string+=+'';
for+($i+=+0;+$i+<+5;+$i%2B%2B)+//+5+-is+considered+here+as+the+length+of+string
++++$string+.=+chr(rand(97,+122));
$_SESSION['captcha']=$string;+++//+stores+to+session+
$image+=+imagecreatetruecolor(110,+28);
$fontArray[0]="a4.ttf";$fontArray[1]="a5.ttf";$fontArray[2]="a1.ttf";$fontArray[3]="a4.ttf";
//+just+a+font+array+for+diff+look+Note+:+try+ttf
$font+=+'font/'.$fontArray[rand()%253];+//+selecting+random+font
$color+=+imagecolorallocate($image,+255,+255,+255);//+color
$background+=+imagecolorallocate($image,+0,+0,+0);+//+background+color
$grey+=+imagecolorallocate($image,+180,+180,+180);//shadow+color
imagefilledrectangle($image,0,0,399,99,$background);
imagettftext($image,+18,+0,+11,+23,+$grey,+$font,+$string);//shadow+of+the+text
imagettftext($image,+18,+0,+10,+22,+$color,+$font,+$string);//+text
//Actual+function+array+imagettftext+(+resource+$image+,+float+$size+,+float+$angle+,+int+$x+,+int+$y+,+int+$color+,+string+$fontfile+,+string+$text+)
header("Content-type:+image/png");
imagepng($image);|code-block|syntax|javascript|1063806|然后将其用作显示页面中的图像。就像-|1063807|<img+id="capcaptcha"+src="captcha.php"+/>
<a+onclick="new_capcaptcha()">Click+here+to+reload+captha</a>|1063808|jQuery|1063809|function+new_capcaptcha(){
++++$('#capcaptcha').attr('src','');
++++$('#capcaptcha').attr('src','captcha.php?rand='%2BMath.random());
++++//+to+avoid+browser+cache+passed+'rand'
++++}+|1063810|对于验证，您可以使用之前存储的会话变量$_+session‘’captcha‘|1063811|希望这篇文章能帮上忙|1063812|entityMap^0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Y|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|Z|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|10|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|11|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|12|8|@]|9|@]|A|$G|H]]|$1|Q|3|R|5|6|7|13|8|@]|9|@]|A|$]]|$1|S|3|T|5|6|7|14|8|@]|9|@]|A|$]]|$1|U|3|-4|5|6|7|15|8|@]|9|@]|A|$]]]|V|$]]

Captcha generation code

captcha.php :

<pre><code>$string = '';
for ($i = 0; $i &lt; 5; $i++) // 5 -is considered here as the length of string
 $string .= chr(rand(97, 122));
$_SESSION['captcha']=$string; // stores to session 
$image = imagecreatetruecolor(110, 28);
$fontArray[0]="a4.ttf";$fontArray[1]="a5.ttf";$fontArray[2]="a1.ttf";$fontArray[3]="a4.ttf";
// just a font array for diff look Note : try ttf
$font = 'font/'.$fontArray[rand()%3]; // selecting random font
$color = imagecolorallocate($image, 255, 255, 255);// color
$background = imagecolorallocate($image, 0, 0, 0); // background color
$grey = imagecolorallocate($image, 180, 180, 180);//shadow color
imagefilledrectangle($image,0,0,399,99,$background);
imagettftext($image, 18, 0, 11, 23, $grey, $font, $string);//shadow of the text
imagettftext($image, 18, 0, 10, 22, $color, $font, $string);// text
//Actual function array imagettftext ( resource $image , float $size , float $angle , int $x , int $y , int $color , string $fontfile , string $text )
header("Content-type: image/png");
imagepng($image);
</code></pre>

Then use this as image in display page. like -

<pre><code>&lt;img id="capcaptcha" src="captcha.php" /&gt;
&lt;a onclick="new_capcaptcha()"&gt;Click here to reload captha&lt;/a&gt;
</code></pre>

jQuery

<pre><code>function new_capcaptcha(){
 $('#capcaptcha').attr('src','');
 $('#capcaptcha').attr('src','captcha.php?rand='+Math.random());
 // to avoid browser cache passed 'rand'
 } 
</code></pre>

for validation you can use the previously stored session variable $_SESSION['captcha']

Hope this will help full

blocks|key|1063030|text|验证码生成器-|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1063031|<?php+
session_start();
//Settings:+You+can+customize+the+captcha+here
$image_width+=+200;
$image_height+=+60;
$characters_on_image+=+5;
$font+=+'./monofont.ttf';

//The+characters+that+can+be+used+in+the+CAPTCHA+code.
//avoid+confusing+characters+(l+1+and+i+for+example)
$possible_letters+=+'23456789bcdfghjkmnpqrstvwxyz';
$random_dots+=+140;
$random_lines+=+5;
$captcha_text_color="0x142864";
$captcha_noice_color+=+"0x142864";

$code+=+'';


$i+=+0;
while+($i+<+$characters_on_image)+{+
$code+.=+substr($possible_letters,+mt_rand(0,+strlen($possible_letters)-1),+1);
$i%2B%2B;
}


$font_size+=+$image_height+*+0.75;
$image+=+@imagecreate($image_width,+$image_height);


/*+setting+the+background,+text+and+noise+colours+here+*/
$background_color+=+imagecolorallocate($image,+255,+255,+255);

$arr_text_color+=+hexrgb($captcha_text_color);
$text_color+=+imagecolorallocate($image,+$arr_text_color['red'],+
++++++++$arr_text_color['green'],+$arr_text_color['blue']);

$arr_noice_color+=+hexrgb($captcha_noice_color);
$image_noise_color+=+imagecolorallocate($image,+$arr_noice_color['red'],+
++++++++$arr_noice_color['green'],+$arr_noice_color['blue']);


/*+generating+the+dots+randomly+in+background+*/
for(+$i=0;+$i<$random_dots;+$i%2B%2B+)+{
imagefilledellipse($image,+mt_rand(0,$image_width),
+mt_rand(0,$image_height),+2,+3,+$image_noise_color);
}


/*+generating+lines+randomly+in+background+of+image+*/
for(+$i=0;+$i<$random_lines;+$i%2B%2B+)+{
imageline($image,+mt_rand(0,$image_width),+mt_rand(0,$image_height),
+mt_rand(0,$image_width),+mt_rand(0,$image_height),+$image_noise_color);
}


/*+create+a+text+box+and+add+6+letters+code+in+it+*/
$textbox+=+imagettfbbox($font_size,+0,+$font,+$code);+
$x+=+($image_width+-+$textbox[4])/2;
$y+=+($image_height+-+$textbox[5])/2;
imagettftext($image,+$font_size,+0,+$x,+$y,+$text_color,+$font+,+$code);


/*+Show+captcha+image+in+the+page+html+page+*/
header('Content-Type:+image/jpeg');//+defining+the+image+type+to+be+shown+in+browser+widow
imagejpeg($image);//showing+the+image
imagedestroy($image);//destroying+the+image+instance
$_SESSION['6_letters_code_1']+=+$code;

function+hexrgb+($hexstr)
{
++$int+=+hexdec($hexstr);

++return+array("red"+=>+0xFF+&+($int+>>+0x10),
+++++++++++++++"green"+=>+0xFF+&+($int+>>+0x8),
+++++++++++++++"blue"+=>+0xFF+&+$int);
}
?>|code-block|syntax|javascript|1063032|您也可以从www.uandblog.com+(http://www.uandblog.com/How-to-Create-Captcha-Code-using-PHP)获取详细信息|offset|length|1063033|entityMap|0|LINK|mutability|MUTABLE|url|http://www.uandblog.com/How-to-Create-Captcha-Code-using-PHP^0|0|0|N|1O|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

Captcha code generator -

<pre><code>&lt;?php 
session_start();
//Settings: You can customize the captcha here
$image_width = 200;
$image_height = 60;
$characters_on_image = 5;
$font = './monofont.ttf';

//The characters that can be used in the CAPTCHA code.
//avoid confusing characters (l 1 and i for example)
$possible_letters = '23456789bcdfghjkmnpqrstvwxyz';
$random_dots = 140;
$random_lines = 5;
$captcha_text_color="0x142864";
$captcha_noice_color = "0x142864";

$code = '';


$i = 0;
while ($i &lt; $characters_on_image) { 
$code .= substr($possible_letters, mt_rand(0, strlen($possible_letters)-1), 1);
$i++;
}


$font_size = $image_height * 0.75;
$image = @imagecreate($image_width, $image_height);


/* setting the background, text and noise colours here */
$background_color = imagecolorallocate($image, 255, 255, 255);

$arr_text_color = hexrgb($captcha_text_color);
$text_color = imagecolorallocate($image, $arr_text_color['red'], 
 $arr_text_color['green'], $arr_text_color['blue']);

$arr_noice_color = hexrgb($captcha_noice_color);
$image_noise_color = imagecolorallocate($image, $arr_noice_color['red'], 
 $arr_noice_color['green'], $arr_noice_color['blue']);


/* generating the dots randomly in background */
for( $i=0; $i&lt;$random_dots; $i++ ) {
imagefilledellipse($image, mt_rand(0,$image_width),
 mt_rand(0,$image_height), 2, 3, $image_noise_color);
}


/* generating lines randomly in background of image */
for( $i=0; $i&lt;$random_lines; $i++ ) {
imageline($image, mt_rand(0,$image_width), mt_rand(0,$image_height),
 mt_rand(0,$image_width), mt_rand(0,$image_height), $image_noise_color);
}


/* create a text box and add 6 letters code in it */
$textbox = imagettfbbox($font_size, 0, $font, $code); 
$x = ($image_width - $textbox[4])/2;
$y = ($image_height - $textbox[5])/2;
imagettftext($image, $font_size, 0, $x, $y, $text_color, $font , $code);


/* Show captcha image in the page html page */
header('Content-Type: image/jpeg');// defining the image type to be shown in browser widow
imagejpeg($image);//showing the image
imagedestroy($image);//destroying the image instance
$_SESSION['6_letters_code_1'] = $code;

function hexrgb ($hexstr)
{
 $int = hexdec($hexstr);

 return array("red" =&gt; 0xFF &amp; ($int &gt;&gt; 0x10),
 "green" =&gt; 0xFF &amp; ($int &gt;&gt; 0x8),
 "blue" =&gt; 0xFF &amp; $int);
}
?&gt;
</code></pre>

You can also get details from www.uandblog.com (<a href="http://www.uandblog.com/How-to-Create-Captcha-Code-using-PHP" rel="nofollow">http://www.uandblog.com/How-to-Create-Captcha-Code-using-PHP</a>)

I am inputting from user in a form which on submit calls a javascript function and checks if compulsory entries are filled or not.if so,it goes to another file.right now i am checking this captcha code in that another file.how can i do so on the same page?
thank you in advance!

to check for captcha code on the same page in php

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我正在从用户输入的表单，在提交时调用javascript函数，并检查强制输入是否填写或not.if，所以，它去到另一个file.right现在我正在检查这个验证码，在另一个file.how我可以这样做在同一页？提前谢谢你！

问在php中检查同一页面上的captcha代码
EN

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