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ÑéÖ¤Âëͨ¹ýGDÉú³ÉPNGͼƬ£¬²¢°Ñ$randvalËæ»úÊý×Ö¸³¸ø$_SESSION['login_check_num']£¬ÔÚͨ¹ýÓû§ÊäÈëµÄ$_POST½øÐбȽϣ¬À´ÅжÏÊÇ·ñÕýÈ·¡£´ïµ½ÐèҪʵÏֵŦÄÜ£¬ÐèÒªÐÞ¸Äphp.iniÎļþ£¬Ê¹phpÖ§³ÖGD¿â¡£
<?php
//µ÷ÓôËÒ³Ãæ£¬Èç¹ûÏÂÃæµÄʽ×Ó³ÉÁ¢£¬ÔòÉú³ÉÑéÖ¤ÂëͼƬ
if($_GET["action"]=="verifycode")
{
    rand_create();
}
//ÑéÖ¤ÂëͼƬÉú³É
function rand_create()
{
    //֪ͨä¯ÀÀÆ÷½«ÒªÊä³öPNGͼƬ
    Header("Content-type: image/PNG");
    //×¼±¸ºÃËæ»úÊý·¢ÉúÆ÷ÖÖ×Ó
    srand((double)microtime()*1000000);
    //×¼±¸Í¼Æ¬µÄÏà¹Ø²ÎÊý 
    $im = imagecreate(62,20);
    $black = ImageColorAllocate($im, 0,0,0);  //RGBºÚÉ«±êʶ·û
    $white = ImageColorAllocate($im, 255,255,255); //RGB°×É«±êʶ·û
    $gray = ImageColorAllocate($im, 200,200,200); //RGB»ÒÉ«±êʶ·û
    //¿ªÊ¼×÷ͼ   
    imagefill($im,0,0,$gray);
    while(($randval=rand()%100000)<10000);{
        $_SESSION["login_check_num"] = $randval;
        //½«ËÄλÕûÊýÑéÖ¤Âë»æÈëͼƬ
        imagestring($im, 5, 10, 3, $randval, $black);
    }
    //¼ÓÈë¸ÉÈÅÏóËØ  
    for($i=0;$i<200;$i++){
        $randcolor = ImageColorallocate($im,rand(0,255),rand(0,255),rand(0,255));
        imagesetpixel($im, rand()%70 , rand()%30 , $randcolor);
    }
    //Êä³öÑé֤ͼƬ
    ImagePNG($im);
    //Ïú»ÙͼÏñ±êʶ·û
    ImageDestroy($im);
}
//¼ìÑéÑéÖ¤Âë
function rand_check()
{
    if($_POST["reg_rand"] == $_SE


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ÖØÐÂÉóÊÓ PHP ¿ò¼Ü CodeIgniter VS Zend

×÷ÕߣºEkerete
·­Ò룺Emeric Li (http://lee.kometo.com/index.php/archives/117
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Ô­ÎÄ£ºhttp://www.avnetlabs.com/php/php ... r-vs-zend-framework
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HTTP Only cookies without PHP 5.2


HTTP Only cookies without PHP 5.2
by Matt Mecham
on September 12, 2006
For a while, Microsoft have had a flag
for cookies called ‘httponly’. This doesn’t sound particularly
exciting, but it is a vital step forward for web application security.
This flag tells Internet Expl ......

php date()º¯Êý˵Ã÷

string date ( string format [, int timestamp] )     //ÆäÖÐtimestampΪ¿ÉÑ¡£¬Ä¬ÈÏֵΪtime();
date("1");    //Monday
date("m.d.y");   //12.21.09
date("m.d.Y");//12.21.2009
$tomorrow  = mktime(0, 0, 0, date("m")  , date("d")+1, date("Y"));
$las ......

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