PHPÈëÃÅ
dz̸PHPÓï·¨(1)
¡¡¡¡ÔÚÄãѧ¹ý»ù±¾µÄHTMLÓï·¨,¾Í¿ÉÒÔ±à³öÒ»¸ö¾²Ì¬µÄWebÒ³£¬¿É¶¯Ì¬½»»¥ÐÅÏ¢ÊǺÜÖØÒªµÄ¡£ÈçһЩÍøÕ¾µÄ»áÔ±ÖƵĻáÔ±×¢²á¡¢µÇ¼¶¼Ðèºó¶Ë³ÌÐòµÄÔËÐС£ºÜ¶àÍøÕ¾ËùÓõÄCGI³ÌÐòÖ÷ÒªÓÃPerl¡¢ASP¡¢Java¡¢PHP±àд£¬¶øÎÒÃÇÏÖÔÚËùÒªÓõľÍÊÇPHP¡£ËüÊÇÍêÈ«Ãâ·ÑµÄ£¬Õâ¾ÍÒª¸ÐлÄÇЩĬĬÎÞÎŵıà³ÌÈËÔ±ÁË¡£PHPµÄ½á¹¹ÀàËÆÓÚ£ÃÓïÑÔ£¬Õâ¿ÉÊÇÓ¦Ö¤ÁË£ÃÓïÑÔÀïÌáµÄ“Ò»´¦Ñ§Ï°£¬µ½´¦±à³Ì”¡£ÏàÐÅѧ¹ý£ÃÓïÑÔµÄÈ˿ɺÜÈÝÒ×ÉÏÊÖPHPµÄ¡£»¹ÊÇÏȽéÉÜһЩPHPÓï·¨°É¡£±¾ÎÄÊʺϳõѧÕßѧϰ¡£
¡¡¡¡PHPÓë£ÃÓïÑÔÒ²ÓÐһЩ²î±ð£¬»òÕß˵ÔÚijÖ̶ֳÈÉÏ¿ÉÄܱȣÃÓïÑÔ¸üΪÁé»î¡£ÔÚ£ÃÓïÑÔÖУ¬±äÁ¿ÒªÏȶ¨Ò壬²ÅÄÜʹÓ᣶øPHPÖбäÁ¿Ôò²»ÐèÊÂÏȶ¨Ò壬ֱ½ÓʹÓü´¿É¡£¶ÔÓÚ±äÁ¿µÄÀàÐÍ£¬ÔÚ¸³ÖµÊ±×Ô¶¯Éú³É¡£PHP±äÁ¿µÄÀàÐÍ·ÖΪ£ºÕûÊý(int)¡¢Ë«¾«¶ÈÐÍ(double)¡¢×Ö·û´®(string)¡¢Êý×é(array)¡¢¶ÔÏó(object)¡£
ÕûÊý´óС³¬³öÆ䷶Χºó£¬×Ô¶¯×ª»¯ÎªË«¾«¶ÈÐÍ£¬ÆäÖµ·¶Î§ÈçÏÂ±í£º
ÉùÃ÷ÀàÐÍ
³¤¶È(λ)
³¤¶È(×Ö½Ú)
ÖµµÄ·¶Î§
int
32
4
-2147483647¡«2147483647
double
32
4
1.7E-308¡«1.7E+308
×Ö·û´®£¬Í¨³£ÓÃ""(Ë«ÒýºÅ)±íʾ¡£Ò²¿ÉÓÃ''(µ¥ÒýºÅ)±íʾ£¬ÈçÏ£º
$a="abc";
$b="abc$a";
$c='abc$a';
$d="\"cde\"";
$e='"cde"';
PHPÖеĸ÷ÖÖ±äÁ¿¾ùÔÚ±äÁ¿ÃûÇ°¼ÓÉÏ“$”ÒÔʾÇø±ð¡£
×¢Ò⣬$bµÄÄÚÈÝΪabcabc£¬$cµÄÄÚÈÝΪabc$a£¬$dµÄÄÚÈÝΪ"cde"£¬$eµÄÄÚÈÝҲΪ"cde"¡£¿ÉÒÔ¿´³ö£¬Ë«ÒýºÅÖеÄÄÚÈÝÖеıäÁ¿Ãû»á±»Ìæ´ú£¬¶øµ¥ÒýºÅÖеÄÔò²»»á¡£Ë«ÒýºÅÖеÄÄÚÈÝÐèתÒ壬Èç$Ó¦ÓÃ\$±íʾ£¬¶øµ¥ÒýºÅÖеÄÔò²»Óá£
PHPÖеÄÊý×éÓ﷨Ϊ£º
Êý×éÃû[Ë÷Òý]
Ë÷Òý¿ÉΪÊý×Ö£¬Ò²¿ÉΪÎÄ×Ö¡£µ«²»½¨ÒéʹÓÃÎÄ×Ö£¬ÒòΪÒâÒå²»´ó¡£¶ÔÓÚÊý×éÒ²±ÈÆäËüÓïÑÔÁé»îÈçÏÂÀý£º
<?php
$names[]=100;
$names[]=200;
$names[]="hi,how are you";
$names[]=98.5;
$names[]=1.7E+23;
$num=count($names);
for ($i=0;$i<=$num;$i++){
echo "$names[$i]<br>";
}
?>
¡¡¡¡¿É¿´³ö£¬Ò»¸öÊý×éÖеÄÔªËز»Ò»¶¨ÎªÍ¬Ò»ÀàÐÍ£¬Õâ¾ÍÊÇPHPÊý×éµÄ“»î”´¦¡£
¡¡¡¡Ê¹ÓöÔÏ󣬿Éʹ±à³ÌÕ߸üÒ×ÓÚά»¤£¬Ò²Ê¹³ÌÐò¸üΪÒ׶Á¡£½ÏÆäËüÓïÑÔ£¬PHP¿É¼òµ¥¶àÁË£¬ËüÖ»ÓÐÀà±ð(class)¡¢·½·¨(method)¡¢ÊôÐÔ(attribute)¼°À©Õ¹(extendsions)µÈ¡£
dz̸PHPÓï·¨(2)
¡¡¡¡Ç°ÎÄ̸µÄÖ»ÊÇPHPµÄÊý¾ÝÀàÐÍ£¬Ëùν“Ä¥µ¶²»Îó¿³²ñ¹¦”£¬´òºÃPHP»ù´¡²ÅÄܸüºÃµØѧºÃPHP±à³Ì¡£
¡¡¡¡PHPÖеıí´ïʽÓëÔË
Ïà¹ØÎĵµ£º
×Ö·û´®µÄ²Ù×÷ÔÚPHP±à³ÌÖÐÕ¼ÓÐÖØÒªµÄµØ룬¼¸ºõËùÓÐPHP½Å±¾µÄÊäÈëºÍÊä³ö¶¼Óõ½×Ö·û´®¡£ÓÈÆäÔÚPHPÏîÄ¿¿ª·¢¹ý³ÌÖУ¬ÎªÁËʵÏÖijÏÄÜ£¬¾©³ÇÐèÒª¶ÔijЩ×Ö·û´®½øÐÐÌØÊâ´¦Àí£¬Èç»ñÈ¡×Ö·û´®µÄ³¤¶È¡¢½ØÈ¡×Ö·û´®¡¢Ìæ»»×Ö·û´®µÈ¡£ËùÒÔÕâÒ²ÊÇÎÒÃǽñÌì¿Î³ÌµÄÖ÷ÒªÄÚÈÝ£¬Ï£ÍûѧԱ¿ÉÒÔÈÏÕæѧϰ£¬ÇÚ¼ÓÁ·Ï°¡£
8.3.1 È¥³ý×Ö·û´®Ê×λ¿Õ¸ñºÍÌØÊ ......
<?php
header("Content-type:text/html;charset=gb2312"); //¿´ÄãÓõÄÊÇʲô±àÂ룬Ҫ±£³ÖÒ»Ö¡£
$files="config.php"; //ҪдÈëµÄÅäÖÃÎļþ¡£
if(!is_writable($files)){ //ÅжÏÊÇ·ñÓпÉдµÄȨÏÞ£¬linux²Ù×÷ϵͳҪעÒâÕâÒ»µã£¬windows²»±Ø×¢Òâ¡£
echo "<font color=red>Îļþ²»¿Éд</font>";
......
Àý×Ó³ÌÐò¡£
<?php
define('CLIENT_MULTI_RESULTS', 131072);
$link = mysql_connect("127.0.0.1", "root", "",1,CLIENT_MULTI_RESULTS) or die("Could not connect: ".mysql_error());
mysql_select_db("vs") or die("Could not select database");
?> ......
С±à֮ǰҲÔø±¨µ¼¹ýPHP¿ª·¢ÈËÔ±ÈÝÒ׺öÂԵļ¸µã¾«»ª,³ýÁËһЩ¾«»ª¼¼Êõ·½·¨Í⣬ºÜ¶àϸ΢֮´¦Ò²ÊdzÌÐòÔ±
ÃÇÈÝÒ׺öÂԵģ¬ÏÂÃæÎÒÃÇΪÄú×ܽáÁË10¸ö¹ØÓÚPHPÄã¿ÉÄܲ»ÖªµÀµÄÊÂÇé¡£
¡¡¡¡¹ØÓÚPHP¸ü¶àÄÚÈÝ£¬»¶Ó·ÃÎÊ£ºPHP¿ª·¢»ù´¡ÈëÃÅ
¡¡¡¡1.ʹÓÃip2long() ºÍlong2ip()º¯ÊýÀ´°ÑIPµØַת»¯³ÉÕûÐÍ´æ´¢µ½Êý¾Ý¿âÀï¡£
¡¡¡¡ÕâÖÖ·½·¨°Ñ´æ´¢ ......
it is 21th of May. The Month of PHP Security
(http://www.php-security.org) is still running and we have reached a
vulnerability count of 40 vulnerabilities, which is nearly as much as we
disclosed during the whole Month of PHP Bugs in 2007. However there are
11 more days until the end of May and ......