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<?php <script src="js/jquery.Jcrop.pack.js"></script> <link rel="stylesheet" href="css/jquery.Jcrop.css" type="text/css" />   µ÷Óà ¼ÙÈ磺 ´úÂë: <img src="flowers.jpg" id="cropbox" /> Wed, 14 Jul 2010 05:59:29 GMT 1 PHPÖе¥ÒýºÅÓëË«ÒýºÅµÄÇø±ð  ¡¡¡¡ÔÚPHPÖУ¬Í¨³£Ò»¸ö×Ö·û´®±»¶¨ÒåÔÚÒ»¶ÔÒýºÅÖУ¬È磺 'I am a string in single quotes' "I am a string in double quotes" ¡¡¡¡PHPÓï·¨·ÖÎöÆ÷ÊÇÓóɶԵÄÒýºÅÀ´ÅжÏÒ»¸ö×Ö·û´®µÄ¡£Òò´Ë£¬ËùÓÐ×Ö·û´®±ØÐëʹÓÃͬһÖÖµ¥»òÕßË« ÒýºÅÀ´¶¨Ò忪ʼºÍ½áÊø¡£ÀýÈ磬ÏÂÃæµÄ×Ö´®¶¨ÒåÊDz»ºÏ·¨µÄ£º "I am not a valid string since I have unmatching quote marks' 'Me neither!" ¡¡¡¡¶¨Òå×Ö·û´®Ê±£¬Ö»ÓÐÒ»ÖÖÒýºÅ±»ÊÓΪ¶¨Òå·û£¬¼´µ¥ÒýºÅ»òË«ÒýºÅ¡£ÓÚÊÇ£¬Èç¹ûÒ»¸ö×Ö·û´®ÓÉË«Òý ºÅ¿ªÊ¼£¬ÄÇôֻÓÐË«ÒýºÅ±»·ÖÎöÆ÷½âÎö¡£ÕâÑù£¬Äã¾Í¿ÉÒÔÔÚË«ÒýºÅ´®Öаüº¬ÈκÎÆäËû×Ö·û£¬ÉõÖÁµ¥Òý ºÅ¡£ÏÂÃæµÄÒýºÅ´®¶¼ÊǺϷ¨µÄ£º $s = "I am a 'single quote string' inside a double quote string"; $s = 'I am a "double quote string" inside a single quote string'; ¡¡¡¡µ±PHPÓöµ½Óë´®µÄ¿ªÍ·Ïà¶ÔÓ¦µÄÒýºÅʱ£¬±ãÈÏΪÒѾ­µ½ÁË×Ö·û´®Î²²¿£¬ÓÚÊÇ£º "Why doesn't "this" work?" ¡¡¡¡Êµ¼ÊÉϱ»PHPÓï·¨·ÖÎöÆ÷·Ö³ÉÈý¸ö²¿·Ö: "Why doesn't "¡ª¡ª°üº¬Ò»¸öµ¥ÒýºÅµÄË«ÒýºÅ´® this¡ª¡ª¶àÓàµÄ×Ö·û£¬·ÖÎöÆ÷ÎÞ·¨´¦Àí " work?" ¡ª¡ªÆÕͨ×Ö·û´® ¡¡¡¡ÉÏÃæµÄÕâ¸öÀý×ÓÆóͼÔÚË«ÒýºÅ´®Öаüº¬Ë«ÒýºÅ£¬¶ø·ÖÎöÆ÷ÔÚÓöµ½µÚ¶þ¸öË«ÒýºÅʱ±ãÈÏΪ×Ö·û´®½á ÊøÁË¡£Òª´ïµ½°üº¬ÒýºÅµÄÄ¿µÄ£¬±ØÐë·ÖÎöÆ÷ÔÚÓöµ½´®ÄÚÆÕͨÒýºÅµÄʱºòºöÂÔËüµÄÔ­Ò⣬ÎÒÃÇÔÚÒýºÅµÄ Ç°Ãæ¼ÓÉÏÒ»¸ö·´Ð±¸ÜÀ´¸æËßPHP£ºÕâ¸öÒýºÅÊÇ×Ö·û´®µÄÒ»²¿·Ö£¬ÕýÈ·µÄ±íʾ·½·¨ÊÇÕâÑù: "Why doesn't \"that\" work?" ¡¡¡¡ÔÚÓ¢ÎÄ×Ö·û´®ÖÐÒ»¸ö³£¼ûµÄÎÊÌâÊÇƲºÅ'µÄʹÓã¬ÒòΪËü¾ÍÊÇÒ»¸öµ¥ÒýºÅ£¬¶øÔÚÓ¢ÎÄ´®ÖÐÊ®·Ö³£¼û £¨Ó¢ÎÄËùÓиñ£©¡£Äã±ØÐëСÐÄ´¦ÀíÕâЩ×Ö·û: 'You\'d better escape your apostrophes' ¡¡¡¡¿ÉÒÔ¿´µ½·´Ð±¸ÜÔÚ×Ö·û´®ÖÐÓÐËûµÄÌØÊ⺬Ò壬µ±ÎÒÃÇÐèÒªÔÚ×Ö·û´®Öаüº¬·´Ð±¸Ü±¾Éíʱ£¬ÐèÒªÔÚ ¸Ã·ûºÅÇ°Ãæ¶à¼ÓÒ»¸ö·´Ð±¸Ü¡£ÀýÈ磺 $file = "c:\windows\system.ini"; echo $file; // ´òÓ¡½á¹ûΪ£º c:windowssystem.ini $file = "c:\\windows\\system.ini"; echo $file; // ´òÓ¡½á¹ûΪ£º c:\windows\system.ini ¡¡¡¡ÁíÒ»ÖÖ×Ö·û´®¶¨Ò巽ʽ£¬Äܹ»Ïû³ýÌØÊâ×Ö·ûµÄ·³ÄÕ£¬¶øÇÒ±ãÓÚÒýÓýϳ¤µÄÎı¾¡£¸Ã×Ö·û´®¶¨Òå·½ ·¨ÒÔ<<<·ûºÅ½ô¸úÒ»¸ö×Ô¶¨Òå×Ö·û´®¿ªÍ·£¬×îºóÒ»ÐÐÒÔ¸Ã×Ô¶¨Òå×Ö·û´®½áÊø£¬²¢ÇÒ±ØÐ붥¸ñ¡£ ¶þ¡¢×Ö´®µÄÁ¬½Ó ¡¡¡¡×Ö´®¿ÉÒÔʹÓÃ×Ö´®Á¬½Ó·û(.)À´Á¬½Ó£¬È磺 $first_name = 'Charlie'; $last_name = 'Brown'; $full_name = $first_name . ' ' . $last_name; ¡¡¡¡³£¼ûµÄÓÃ;Êǽ¨Á¢´ó¿éµÄHTML×Ö´®´úÂ룬¸³ÖµºÅ (=) Á¬½Ó·û (.) ¿ÉÒÔ±»¼òдºÏ²¢Îª (.=) ·û ºÅ£¬È磺 $html = '<table>'; $html .= '<tr><td>number</td><td>square</td></tr>'; for ( $i=0 ; $i<10 ; $i++) { $square = $i * $i; $html .= '<tr><td>' . $i . '</td><td>' . $square . '</td></tr>'; } $html .= '</table>'; Èý¡¢ÔÚ×Ö´®ÖÐʹÓñäÁ¿ ¡¡¡¡Õâ¸ö¹¦ÄÜÈÃÄãÎÞÐëʹÓÃÁ¬½Ó·ûºÅÀ´Õ³ºÍ´óÁ¿µÄ¼òµ¥×Ö·û´®¡£PHPÔÊÐíÎÒÃÇÔÚË«ÒýºÅ´®ÖÐÖ±½Ó°üº¬×Ö ´®±äÁ¿£¬ÎÒÃÇ¿ÉÒÔ·¢ÏÖÏÂÃæµÄÁ½¸ö×Ö´®µÄ´¦Àí½á¹ûÊÇÏàͬµÄ¡£ $full_name = $first_name . ' ' . $last_name; $full_name = "$first_name $last_name"; ¡¡¡¡µ¥ÒýºÅ´®ºÍË«ÒýºÅ´®ÔÚPHPÖеĴ¦ÀíÊDz»ÏàͬµÄ¡£Ë«ÒýºÅ´®ÖеÄÄÚÈÝ¿ÉÒÔ±»½âÊͶøÇÒÌæ»»£¬¶øµ¥Òý ºÅ´®ÖеÄÄÚÈÝ×ܱ»ÈÏΪÊÇÆÕͨ×Ö·û¡£ÀýÈ磺 $foo = 2; echo "foo is $foo"; // ´òÓ¡½á¹û: foo is 2 echo 'foo is $foo'; // ´òÓ¡½á¹û: foo is $foo echo "foo is $foo\n"; // ´òÓ¡½á¹û: foo is 2 (ͬʱ»»ÐÐ) echo 'foo is $foo\n'; // ´òÓ¡½á¹û: foo is $foo\n ¡¡¡¡ÕýÈçÄãËù¿´µ½µÄ£¬ÔÚµ¥ÒýºÅ´®ÖÐÉõÖÁ·´Ð±¸ÜҲʧȥÁËËûµÄÀ©Õ¹º¬Ò壨³ýÁ˲åÈ뷴б¸Ü\\ºÍ²åÈëµ¥  ÒýºÅ\'£©¡£ËùÒÔ£¬µ±ÄãÏëÔÚ×Ö´®ÖнøÐбäÁ¿´ú»»ºÍ°üº¬\n£¨»»Ðзû£©µÈתÒåÐòÁÐʱ£¬ÄãÓ¦¸ÃʹÓÃË«Òý ºÅ¡£µ¥ÒýºÅ´®¿ÉÒÔÓÃÔÚÆäËûÈκεط½£¬½Å±¾ÖÐʹÓõ¥ÒýºÅ´®´¦ÀíËٶȻá¸ü¿ìЩ£¬ÒòΪPHPÓï·¨·ÖÎöÆ÷¶Ô µ¥ÒýºÅ´®µÄ´¦Àí·½Ê½±È½Ïµ¥´¿£¬¶øË«ÒýºÅµÄ´¦ÀíÓÉÓÚ´®ÄÚ²¿Ò²ÐèÒª½âÎö£¬Òò´Ë¸ü¸´ÔÓЩ£¬ËùÒÔ´¦ÀíËÙ ¶ÈÂÔÂý¡£   ¡¡¡¡ÔÚ×Ö·û´®ÖÐÒýÓø´ÔӵıäÁ¿×éºÏʱ£¬¿ÉÄÜ»á²úÉúһЩÎÊÌ⣬ÏÂÃæµÄ´úÂë»áÕý³£¹¤×÷£º echo "value = $foo"; echo "value = $a[$i]"; ¡¡¡¡¶øÏÂÃæµÄ´úÂëÈ´²»Äܵõ½ÎÒÃÇÏ£ÍûµÄ½á¹û: echo "value = $a[$i][$j]"; //ÎÒÃÇÏ£Íû´òÓ¡¶þάÊý×é$aµÄij¸öÔªËØ¡£ ¡¡¡¡Îª±ÜÃâÕâЩ×Ö´®Ê¹ÓÃÖеÄDZÔÚÎÊÌ⣬ÎÒÃÇͨ³£°Ñ¸´ÔӵıäÁ¿´Ó×Ö´®ÖзÖÀ뿪À´£¬¾ÍÏñÕâÑù£º echo 'value = ' . $a[$i][$j]; ¡¡¡¡»¹ÓÐÒ»ÖÖ°ì·¨Êǽ«¸´ÔÓ±äÁ¿Óû¨À¨ºÅÀ¨ÆðÀ´£¬Óï·¨·ÖÎöÆ÷¾ÍÄÜÕýÈ·±æÈÏÁË: echo "value = {$a[$i][$j]}" //´òÓ¡¶þάÊý×é$aµÄij¸öÔªËØ ¡¡¡¡ÕâÑù£¬ÓÖ³öÏÖÐÂÎÊÌâÁË¡£µ±ÎÒÃÇÏëÔÚ×Ö´®ÖÐÒýÓû¨À¨ºÅ×Ö·û±¾Éíʱ£¬¾ÍÒª¼ÇµÃʹÓÃתÒå·ûÁË£º $var = 3; echo "value = {$var}"; // ´òÓ¡½á¹û "value = 3" echo "value = \{$var}"; // ´òÓ¡½á¹û "value = {3}" Èý¡¢Ð±¸ÜºÍSQLÓï¾ä ¡¡¡¡Éú³ÉHTML´úÂë»òSQL²éѯÓï¾äÊDZàдPHP³ÌÐòʱ¾­³£Óöµ½¶øÇÒÊǼþÓÐȤµÄÊÂÇ顣ΪʲôÕâô˵ÄØ£¬ ÒòΪÕâÉæ¼°µ½Éú³ÉÁíÍâÒ»ÖÖÀàÐ͵ĴúÂ룬Äã±ØÐë×ÐϸµØ¿¼ÂǺÍ×ñÑ­ÕâÖÖ´úÂëËùÒªÇóµÄ±àдÓï·¨ºÍ¹æÔò¡£ ¡¡¡¡ÎÒÃÇÀ´¿´ÕâÑùÒ»¸öÀý×Ó£¬¼ÙÈçÄãÏë²éѯÊý¾Ý¿âÖÐÃû×ÖÊÇ¡°O'Keefe¡±µÄÓû§£¬Í¨³£SQLÓï¾äµÄÐÎʽÊÇÕâÑùµÄ£º select * from users where last_name = 'O\'Keefe' ¡¡¡¡Çë×¢ÒâSQLÓï¾äÕâ¸öÓ¢ÎÄËùÓиñ£¨Æ²ºÅ£©ÐèʹÓ÷´Ð±¸ÜתÒå¡£PHPרÃÅÌṩÁËһЩº¯ÊýÀ´´¦ÀíÕâÑùµÄÇé¿ö£¬º¯ÊýAddSlashes($str)µÄÓÃ;¾ÍÊÇ×Ô¶¯ÔÚ×Ö´®ÖжÔÒýºÅ×Ö·û²åÈ뷴б¸ÜתÒå·û£º $last_name = "O'Keefe"; $sql = "select * from users where last_name = '" . addslashes($last_name) . "'"; ¡¡¡¡ÔÚÕâ¸öÀý×ÓÖУ¬Ä㻹ҪÔ% ]]> Wed, 14 Jul 2010 05:54:34 GMT 1 PHPÖе¥ÒýºÅÓëË«ÒýºÅµÄÇø±ð  ¡¡¡¡ÔÚPHPÖУ¬Í¨³£Ò»¸ö×Ö·û´®±»¶¨ÒåÔÚÒ»¶ÔÒýºÅÖУ¬È磺 'I am a string in single quotes' "I am a string in double quotes" ¡¡¡¡PHPÓï·¨·ÖÎöÆ÷ÊÇÓóɶԵÄÒýºÅÀ´ÅжÏÒ»¸ö×Ö·û´®µÄ¡£Òò´Ë£¬ËùÓÐ×Ö·û´®±ØÐëʹÓÃͬһÖÖµ¥»òÕßË« ÒýºÅÀ´¶¨Ò忪ʼºÍ½áÊø¡£ÀýÈ磬ÏÂÃæµÄ×Ö´®¶¨ÒåÊDz»ºÏ·¨µÄ£º "I am not a valid string since I have unmatching quote marks' 'Me neither!" ¡¡¡¡¶¨Òå×Ö·û´®Ê±£¬Ö»ÓÐÒ»ÖÖÒýºÅ±»ÊÓΪ¶¨Òå·û¡­¡­ ]]> Sun, 13 Jun 2010 01:43:23 GMT Some web sites and applications have complex ways of parsing and manipulating data before the information is presented to the visitor or user. This article addresses the need for page caching, a way of processing the information once and caching the page's content for any subsequent views. I'm writing this article in view of providing page caching for simple CMSs (Content Management Systems). The key points for processing page caching are as follows: If there is already ¡­¡­ ]]> Sat, 12 Jun 2010 20:05:37 GMT smartyÖÐÓÐÒ»¸ö»ñÈ¡Ä£°åÒ³ÄÚÈÝ·½·¨fetch(), ËüµÄÉùÃ÷Ô­ÐÎÊÇÕâÑùµÄ: <?php function ¡­¡­ ]]> Sat, 12 Jun 2010 02:25:20 GMT ÖØд¹æÔòÖеÄSubstitutionÊǵ±Ô­Ê¼URLÓëPatternÏàÆ¥Åäʱ£¬ÓÃÀ´Ìæ´ú(»òÌæ»»)µÄ×Ö·û´®¡£³ýÁË´¿Îı¾£¬»¹¿ÉÒÔ°üº¬£º ¶ÔPatternµÄ·´ÏòÒýÓÃ($N) ¶Ô×îºóÆ¥ÅäµÄRewriteCondµÄ·´ÏòÒýÓÃ(%N) ¹æÔòÌõ¼þ²âÊÔ×Ö·û´®(%{VARNAME})ÖеķþÎñÆ÷±äÁ¿ Ó³É亯Êýµ÷ÓÃ(${mapname:key|default}) ·´ÏòÒýÓõÄ$N(N=0..9)ÊÇÖ¸ÓÃPatternÆ¥ÅäµÄµÚN×éµÄÄÚÈÝÈ¥Ìæ»»URL¡£·þÎñÆ÷±äÁ¿ÓëRewriteCondÖ¸ÁîµÄTestStringÏàͬ¡£Ó³É亯ÊýÓÉRewriteMapÖ¸Áî¾ö¶¨£¬Æä˵Ã÷Ò²²Î¼û¸ÃÖ¸Áî¡£ÕâÈýÖÖÀàÐͱäÁ¿°´ÉÏÃæÁбíÖеÄ˳Ðò±»Õ¹¿ª¡£ ÈçÉÏËùÊö£¬ËùÓеÄÖØ¡­¡­ ]]> Sat, 12 Jun 2010 02:30:51 GMT ÔÚ±¾ÀýÖУ¬Í¨¹ýʱ¼ä´¥·¢»º´æ¼¼Êõ±»ÔËÓã¬É趨һ¶Îʱ¼äºóÈÃÆ仺´æSQLÊä³ö¹ýÆÚ¡£ÔÚ´ËÌØÊâµÄÀý×ÓÖУ¬¶¨Ò»¶Îʱ¼äΪ24Сʱ¡£ ÐòÁл¯Àý×Ó£º <¡­¡­ ]]> Sat, 12 Jun 2010 02:39:07 GMT ½«phpÎļþÖо­³£Óõ½£¬²¢ÇÒÐèÒª¾­³£¶à´Î²éѯÊý¾Ý¿âµÄ£¬Óõ½»º´æ½«¿ÉÒԺܺõĽµµÍÄÚ´æÏûºÄ£¬¼Ó¿ì·ÃÎÊËٶȡ£ ÕâÀïÌÖÂÛµÄÊÇʹÓÃserialize½«Êý×éת³É×Ö´®£¬´æ´¢ÔÚÎļþÖУ¬Ê¹ÓõÄʱºòÔÙ½«×Ö´®×ª»»³ÉÊý×é,Ϊʲô²»ÓÃÎļþÖ±½Ó´æ´¢Êý×飬ÕâÒ²ÊÇ¿ÉÒԵġ£ PHPWind£¬discuz¾ÍÊÇÕâô¸ÉµÄ£¬µ«ÕâÀï¾Í²»ÌÖÂÛÁË¡£ ͨ¹ýserialize£¬unserialize£¬freadʵÏÖ´æ´¢ºÍÊÍ·ÅÊý×éµÄ¹ý³Ì£¬´úÂëÈçÏ£º Sat, 12 Jun 2010 02:43:44 GMT ±¾ÎÄÕÂ×÷ÕßÖ÷ÒªÊÇÓõ½ php ÀïÃæµÄÊý¾Ý¿â»º´æ£¬php»º´æ,cache_write,var_export¹¦ÄܶÔÊý¾Ý½øÐлº´æ²Ù×÷ÁË£¬¾õµÃдµÃºÜ²»´í¡£ Èç¹ûºǫ́ӦÓýÓÊÕµ½ä¯ÀÀÆ÷¶ËµÄ²éѯÇëÇóºó£¬Ã¿´Î¶¼ÓëÊý¾Ý¿âÁ¬½Ó¶ÁÈ¡Êý¾Ý£¬ÊƱØÔö¼ÓÊý¾Ý¿âµÄ¸ºµ£¡£¶øÍùÍùÓдóÁ¿µÄÇëÇóÊÇÖظ´µÄ£¬ÎÒÃÇ¿ÉÒÔ°ÑÕâЩÖظ´µÄÐÅÏ¢²ÉÓûº´æ¼¼Êõ±£´æÏÂÀ´£¬Öظ´Ê¹Óã¬ÕâÑù£¬ÔÚijЩÇé¿öÏ¿ÉÒÔ´ó´óÌá¸ß³ÌÐòµÄÐÔÄÜ¡£ Ò»¡¢»º´æº¯Êý cache_writeº¯Êý½ÓÊÜ$string²ÎÊý£¬Ð´µ½$fileÎļþÖС£×¢Òâvar_exportº¯Êý£¬×÷ÓÃÊÇ£º ´Ëº¯Êý·µ»Ø¹ØÓÚ´«µÝ¸ø¸Ãº¯ÊýµÄ±äÁ¿¡­¡­ ]]> Sat, 12 Jun 2010 09:12:48 GMT Discuz!µÄ»º´æͬÑù·ÖÁËÖ÷¶¯»º´æºÍ±»¶¯»º´æ¡£´Ó¹¦ÄÜÉÏÀ´Ëµ£¬Ö÷¶¯»º´æÒ»°ãÓõ½¹ÜÀíÔ±¶ÔÈ«Õ¾µÄÉèÖ㬵ȵÈÐèÒªÊÖ¶¯¸üеĵط½£¬ÕâЩµØ·½µÄÊý¾Ý¶¼ÓÐÒ»¸öÌص㣬ÄǾÍÊÇËüÃǵĸüпÉÄÜÐÔºÜС£¬Æ½Ê±²»ÐèÒª×Ô¶¯¸üУ»Discuz!µÄ±»¶¯»º´æ£¬Ò»°ã·Ö²¼ÔÚÖîÈçÌû×ÓÄÚÈÝÏÔʾ£¬Óû§ÐÅÏ¢¸üÐÂÕâЩµØ·½£¬ÕâЩµØ·½µÄ¸üлù±¾É϶¼ÊÇÒòΪÓû§Ê¹ÓÃÁËijһÌض¨µÄ¹¦ÄÜʱËù¼¤·¢µÄ¡£ ÔÚÕý³£ÔËÐеÄDiscuz!ϵͳÎļþ¼ÐÀïÃæ»áÓÐÒ»¸öforumdataÎļþ¼Ð£¬Õâ¸öÊÇÂÛ̳¼Ç¼ºÍ»º´æÎļþµÄ´æ·ÅĿ¼£¬Ò»°ãÕâЩÎļþ¶¼ÊÇ×Ô¶¯Éú³ÉµÄ£¬ÔÚforumdata/cache/ÀïÃæ´æ´¢µÄ¶¼ÊÇһЩ¡­¡­ ]]> Sat, 12 Jun 2010 09:18:16 GMT <?php /* $cache = new Cache("../cache/",20); // ¹¹Ô캯Êý£¬´´½¨»º´æÀà¶ÔÏó ¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­ ¡­¡­¡­¡­¡­¡­¡­¡­ ]]> Sat, 12 Jun 2010 10:12:40 GMT class DbConn {   static $instance = false;   private function __construct