(×ªÔØ)ÓÅ»¯PHP´úÂëµÄ40Ìõ½¨Òé
ÔÎÄÁ´½Ó£ºhttp://webdev.csdn.net/page/58438f5e-704e-4e80-bdbd-7d06e8ecceb9#
40 Tips for optimizing your php Code
ÔÎĵØÖ·£ºhttp://reinholdweber.com/?p=3
Ó¢ÎİæÈ¨¹éReinhold WeberËùÓУ¬ÖÐÒëÎÄ×÷Õßyangyang£¨aka davidkoree£©¡£Ë«Óï°æ¿ÉÓÃÓÚ·ÇÉÌÒµ´«²¥£¬µ«Ðë×¢Ã÷Ó¢Îİæ×÷Õß¡¢°æÈ¨ÐÅÏ¢£¬ÒÔ¼°ÖÐÒëÎÄ×÷Õß¡£·ÒëˮƽÓÐÏÞ£¬Çë¹ã´óPHPerÖ¸Õý¡£
1. If a method can be static, declare it static. Speed improvement is by a factor of 4. Èç¹ûÒ»¸ö·½·¨¿É¾²Ì¬»¯£¬¾Í¶ÔËü×ö¾²Ì¬ÉùÃ÷¡£ËÙÂÊ¿ÉÌáÉýÖÁ4±¶¡£
2. echo is faster than print. echo ±È print ¿ì¡£
3. Use echo’s multiple parameters instead of string concatenation. ʹÓÃechoµÄ¶àÖØ²ÎÊý£¨Òë×¢£ºÖ¸ÓöººÅ¶ø²»ÊǾäµã£©´úÌæ×Ö·û´®Á¬½Ó¡£
4. Set the maxvalue for your for-loops before and not in the loop. ÔÚÖ´ÐÐforÑ»·Ö®Ç°È·¶¨×î´óÑ»·Êý£¬²»ÒªÃ¿Ñ»·Ò»´Î¶¼¼ÆËã×î´óÖµ¡£
5. Unset your variables to free memory, especially large arrays. ×¢ÏúÄÇЩ²»ÓõıäÁ¿ÓÈÆäÊÇ´óÊý×飬ÒÔ±ãÊÍ·ÅÄÚ´æ¡£
6. Avoid magic like __get, __set, __autoload ¾¡Á¿±ÜÃâʹÓÃ__get£¬__set£¬__autoload¡£
7. require_once() is expensive require_once()´ú¼Û°º¹ó¡£
8. Use full paths in includes and requires, less time spent on resolving the OS paths. ÔÚ°üº¬ÎļþʱʹÓÃÍêÕû·¾¶£¬½âÎö²Ù×÷ϵͳ·¾¶ËùÐèµÄʱ¼ä»á¸üÉÙ¡£
9.
If you need to find out the time when the script started executing,
$_SERVER[’REQUEST_TIME’] is preferred to time()
Èç¹ûÄãÏëÖªµÀ½Å±¾¿ªÊ¼Ö´ÐУ¨Òë×¢£º¼´·þÎñÆ÷¶ËÊÕµ½¿Í»§¶ËÇëÇ󣩵Äʱ¿Ì£¬Ê¹ÓÃ$_SERVER[‘REQUEST_TIME’]ÒªºÃÓÚtime()¡£
10. See if you can use strncasecmp, strpbrk and stripos instead of regex. ¼ì²éÊÇ·ñÄÜÓÃstrncasecmp£¬strpbrk£¬striposº¯Êý´úÌæÕýÔò±í´ïʽÍê³ÉÏàͬ¹¦ÄÜ¡£
11.
str_replace is faster than preg_replace, but strtr is faster than
str_replace by a factor of 4.
str_replaceº¯Êý±Èpreg_replaceº¯Êý¿ì£¬µ«strtrº¯ÊýµÄЧÂÊÊÇstr_replaceº¯ÊýµÄËı¶¡£
12.
If the function, such as string replacement function, accepts both
arrays and single characters as arguments, and if your argument list is
not too long, consider writing a few redund
Ïà¹ØÎĵµ£º
<?php
$conn = "what's the fucking";
?>
<mce:script type="text/javascript"><!--
var innn = "<?php echo $conn ?>";
document.write(innn);
// --></mce:script>
phpºÍJavaScriptµÄ±äÁ¿²»ÄÜͨÓ㬵«µ±ÎÒÃÇÐèÒªÔÚÒ»¸öÒ³ÃæÊ¹ÓÃͬһ¸ö±äÁ¿Ê±£¬¿ÉÒÔ ......
PHPº¯Êý°´ÒýÓô«µÝµÄÀý×Ó
Ê×ÏÈÈÃÎÒÃÇÀ´¿´Ò»¶Î´úÂëÈçÏ£º
<?php
$cost=20.99;
$tax=0.75;
function calculateCost(&$cost,$tax){
$cost=$cost+($cost*$tax);
$tax+=4;
}
calculateCost($cost,$tax);
printf("Tax is:%1.2f<br />",$tax);
  ......
ת×Ô£ºhttp://www.chinaz.com/news/Visit/091Y21R2009.html
Rasmus Lerdorf¿ÉÄÜÊǸñÁêÀ¼×îÖøÃûµÄµçÄÔÅ£ÈË£¬Ëû1995Äê´´½¨ÁËPHP½Å±¾ÓïÑÔ£¬²¢³É¹¦Ó¦Óõ½ËûµÄÍøÕ¾ÖУ¬ÔÚËûµÄÒ»ÊÖÔÔÅàÏ£¬PHPÒѱä³ÉÒ»¸öÇ¿´óµÄ£¬ÍêÈ«³ÉÊìµÄÓïÑÔ£¬Ä¿Ç°ÊÀ½ç¸÷µØÒÑÓÐÊý°ÙÍòPHPÓ¦Óð¸Àý¡£
PHP´´Ê¼ÈËRasmus Lerdorf
Linux FormatÔÓÖ¾¶ÔRasmus Lerd ......
ǰÑÔ
ÕýÈç´ó¼ÒÒ»Ñù£¬µ±ÎÒ¾õµÃҪѧϰһÖÖÐµĶ«Î÷µÄʱºò£¬×ÜÊÇÓÐÒ»ÖÖ¾Þ´óµÄѹÁ¦£®Ê×ÏÈÒ»¸öÎÊÌâÊÇ£ºÊÇ·ñ¿ÉÒÔѧ»á£®ÁíÒ»¸öÎÊÌâÔòÊÇ£ºÕâ¸öеÄ֪ʶÊÇ·ñÄܹ»ÕÒµ½Ò»·Ý¹¤×÷£®Èç¹ûÄ㻹ÊÇÒ»ÃûѧÉú£¬ÄÇôÄãÓ¦¸Ã¸Ðµ½¸ßÐË£¬ÒòΪѧУÀïµÄÉú»î²»ÊÇÓÉÄã×Ô¼ºÌṩ±£Õϵģ¬ËùÒÔ²»Òª¿¼ÂÇα£ÎÊÌ⣻µ«ÊÇ×Ô´ÓѧУ³öÀ´ºó£¬²ÅÖªµÀÉú»îÊÇʲô×Ìζ ......
ÔÌù£ºhttp://www.haw-haw.org/node/150
ÓÃÀ´ÔÚphp³ÌÐòÀï·½±ãµÄÁ¬µ½Ô¶³ÌÖ÷»ú
Ö´ÐгÌÐò
²¢È¡»Ø½á¹û
Ê×ÏÈ£¬ÏµÍ³ÐèÒªÒѾװÓÐopensslºÍopenssl-devel°ü
rpm -qa | grep openssl
È»ºó£¬°²×°libssh2
µ±ÏÂÀ´Ô´´úÂëºó
./configure && make all install
ÔÙÈ»ºó£¬°²×°PECL/ssh2
¿ÉÒÔÓÃÃüÁîpear install ssh2
(ÑÛÇ ......