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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" /> Fri, 16 Jul 2010 01:59:27 GMT <?php     $content1= ¡¡¡¡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¡­¡­ ]]> 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% ]]> 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). 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