phpÖÐµÄ Àà³£Á¿ Class Constants
It is possible to define constant values on a per-class basis remaining the same and unchangeable.
Constants differ from normal variables in that you don't use the $ symbol to declare or use them. Like static members, constant values cannot be accessed from an instance of the object (using $object::constant).
˵Ã÷£º const ³£Á¿ ²»Óà $ ·ûºÅ
const ²»¼Ó¹Ø¼ü×Ö private ÐÞÊÎ //Like static members,
²»ÄÜͨ¹ý ¶ÔÏó·ÃÎÊ¡£ Ö»ÄÜͨ¹ýclass·ÃÎÊ
Àý×Ó 19-15. Defining and using a constant
<?php
class MyClass
{
const constant = 'constant value';
function showConstant() {
echo self::constant . "\n";
}
}
echo MyClass::constant . "\n";
$class = new MyClass();
$class->showConstant();
// echo $class::constant; is not allowed
?>
Ïà¹ØÎĵµ£º
8 ·ÃÎÊÀàÐÍ
ÀàÐ͵ķÃÎÊÐÞÊηûÔÊÐí¿ª·¢ÈËÔ±¶ÔÀà³ÉÔ±µÄ·ÃÎʽøÐÐÏÞÖÆ£¬ÕâÊÇPHP5 µÄÐÂÌØÐÔ£¬µ«È´ÊÇOOPÓïÑÔµÄÒ»¸öºÃµÄÌØÐÔ¡£¶øÇÒ´ó¶àÊýOOP ÓïÑÔ¶¼ÒÑÖ§³Ö´ËÌØÐÔ¡£PHP5 Ö§³ÖÈçÏÂ3 ÖÖ·ÃÎÊÐÞÊηû£º
public(¹«Óеġ¢Ä¬ÈϵÄ)£¬private(˽ÓеÄ)ºÍprotected(Êܱ£»¤µÄ)ÈýÖÖ¡£
public ¹«ÓÐÐÞÊηû£¬ÀàÖеijÉÔ±½«Ã»ÓзÃÎÊÏÞÖÆ£¬ËùÓеÄÍⲿ ......
1:·ÅÁË6¸öÎļþÔÚcÅÌÏÂ(php5ts.dll,libmysql.dll ,php_gd2.dll,php_mysql.dll,php_mbstring.dll ),Ò»¸öÔÚwindowsÏÂ,ÁíÎå¸öÔÚwindows/system32ÏÂ
2:ÅäÖÃÁËpath
3:ÃüÁî:httpd.exe -w -n "Apache2" -k start À´²é¿´ÊÇÄÄÒ»ÐеĴíÎóÐÅÏ¢.
×ܽá:µ½ÏÖÔÚΪֹ,ÕûÁËÒ»Ìì,×°ÁËÈý´ÎϵͳµÄÂé·³ÖÕÓÚÇ×ÉíÖ¤Ã÷ÁË,
Õâ¸ö×ï¿ý»öÊײúÉúµÄÔÒò ......
תÑÛÓÖÊÇÒ»Äê¹ýÈ¥ÁË£¬Ëƺõ£¬×î½üÎåÁùÄêÀ´£¬Ò»Ö±¶¼¹ýµÃ²»ÄÇô˳Àû£¬½ñÄ껹ËãÊDz»´í£¬ÖÁÉÙ£¬ÔÚ¿Í»§¡¢ÀϰåºÍͬʵİïÖúÏ£¬Ò»ÄêµÄ¹¤×÷£¬ÖÕÓÚÔÚÄêǰÊÕβÁË¡£ÔÚ´ËС½áһϣ¬ÎüȡһЩ½Ìѵ£¬ÒÔÃâÀ´ÄêÖØ·¸ÏàͬµÄ´íÎó¡£
1¡¢×öÁËÒ»¸ö×îÕýÈ·µÄÑ¡Ôñ£º¹Ò¿¿Ò»¼ÒÈí¼þ¹«Ë¾×ö³ÌÐò¡£×ö³ÌÐòºÍ×öÒµÎñ£¬ÊDz»Ó¦¸Ãͬһ¸öÈ˽øÐе쬾ÍËã¿Í»§ÊÇÖ÷¶¯É ......
http://www.phpli.com/tuto/viewarticle.php?columns=tutorial&id=493
Ò»¡¢¿ª·¢³ÉÔ±
a)ÏîÄ¿Ö÷¹Ü
b)Ò³ÃæÃÀ¹¤
c)Ò³Ãæ¿ª·¢
d)·þÎñ¶Ë³ÌÐò¿ª·¢
e)ϵͳÓëÊý¾Ý¹ÜÀí
f)²âÊÔÓë°æ±¾¿ØÖÆ
¶þ¡¢ ÍøÕ¾×鿪·¢¼òÃ÷Á÷³Ì
Èý¡¢ ¿ª·¢¹¤¾ßÓë»·¾³
a)·þÎñÆ÷ÅäÖÃ
i. WEB·þÎñÆ÷£º FreeBSD6.1+Apache2.0+PHP5.0£¬SVN°æ±¾¿ØÖÆ·þÎñ(½ö²âÊ ......