Php Dechex

In PHP to generate a CAPTCHA image is quite simple, because in PHP for us to provide a graphics Gd.dll library, to enable the GD graphics library we just php.ini in the PHP-GD front; Method a $authnum = '; $ychar = "0,1,2,3,4,5,6,7,8,9,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z&qu ...

php tutorial package (online decompression and online package download source) This program supports file download decompression and online compression, so that we find examples of online decompression and online package download. * / //phpzip.class.php class phpzip {var $ datasec, $ ctrl_dir = array (); var $ eof_ctrl_dir = "x50x4bx05x06x00x00x00 ...

php tutorial to get the string uft-8 encoding // method one echo preg_replace ('# [x {4e00} -x {9fa5}] # ue', 'chinese_unicode (' ") '," hello, china "); / Guarantee "Hello, China" is utf-8. function chinese_unicode ($ c) {& n ...

There are many cross-site scripting vulnerabilities in many domestic forums, and there are (quite a few) foreign (and many) more such examples, and even Google (also) has appeared, but was fixed in early December. (Editor's note: For cross-site scripting exploits, readers can refer to "Detailed XSS cross-site scripting attacks"). Cross-site attacks (very) easy to construct, and very subtle, not easy to be detected (usually steal information immediately after the jump back to the original page). How to attack, not to explain here ((and) Do not ask me), the main talk about how to prevent. First of all, cross-site scripting attacks are (due) to the user's ...

The general function of converting a Chinese character to Unicode does not depend on any library or any other custom function, but conditionally: this file and the input parameters of the function should be encoded with utf-8, otherwise the function conversion should be added. ? /** * A common function to convert a Chinese character to Unicode do not rely on any library, and other custom functions, but conditional * conditions: This file and the function of the input parameters should be encoded with utf-8, or to add function conversion * In fact, can easily write the reverse conversion function, even not limited to Chinese characters, strange for ...