ÅжÏphp±äÁ¿ÊÇ·ñ¶¨Ò壬ÊÇ·ñΪ¿Õ
isset() ¡¾1¡¿
Returns TRUE if var
exists and has value other
than NULL, FALSE otherwise.
ÊäÈë¿ÉÒÔÊǶà¸ö±äÁ¿£¬Ö»ÓÐËùÓеıäÁ¿ÎªÕæµÄʱºò£¬·µ»ØÕæ
empty()¡¾2¡¿
Returns FALSE if var
has a non-empty
and non-zero value.
The following things are considered to be empty:
"" (an empty string)
0 (0 as an integer)
"0" (0 as a string)
NULL
FALSE
array() (an empty array)
var $var; (a variable declared, but without a
value in a class)
ÊäÈëÖ»ÄÜÊÇÒ»¸ö±äÁ¿
is_null() ¡¾3¡¿
Returns TRUE if var is
null , FALSE
otherwise.
A variable is considered to be null if:
it has been assigned the constant NULL.
it has not been set to any value yet.
it has been unset().
ʹÓà PHP º¯Êý¶Ô±äÁ¿ $x ½øÐбȽÏ
±í´ïʽgettype()empty()is_null()isset()if($x) Boolean
$x = "";
string
TRUE
FALSE
TRUE
FALSE
$x = null;
NULL
TRUE
TRUE
FALSE
FALSE
var $x;
NULL
TRUE
TRUE
FALSE
FALSE
$x is undefined
NULL
TRUE
TRUE
FALSE
FALSE
$x = array();
array
TRUE
FALSE
TRUE
FALSE
$x = false;
boolean
TRUE
FALSE
TRUE
FALSE
$x = true;
boolean
FALSE
FALSE
TRUE
TRUE
$x = 1;
integer
FALSE
FALSE
TRUE
TRUE
$x = 42;
integer
FALSE
FALSE
TRUE
TRUE
$x = 0;
integer
TRUE
FALSE
TRUE
FALSE
$x = -1;
integer
FALSE
FALSE
TRUE
TRUE
$x = "1";
string
FALSE
FALSE
TRUE
TRUE
$x = "0";
string
TRUE
FALSE
TRUE
FALSE
$x = "-1";
string
FALSE
FALSE
TRUE
TRUE
$x = "php";
string
FALSE
FALSE
TRUE
TRUE
$x = "true";
string
FALSE
FALSE
TRUE
TRUE
$x = "false";
string
FALSE
FALSE
TRUE
TRUE
£¨ÉϱíûÓÐÕÒµ½ÔʼÀ´Ô´£¬ËÖªµÀÇë¸æËßÎÒ£©
Èç¹û±äÁ¿ÊÇÒ»¸öobject¸ÃÈçºÎÄØ£¿
±í´ïʽgettype()empty()is_null()isset()if($x) Boolean
$x = new object()
object
FALSE
FALSE
TRUE
TRUE
²Î¿¼£º
¡¾1¡¿http://php.net/manual/en/function.isset.php
¡¾2¡¿http://www.php.net/manual/en/function.empty.php
¡¾3¡¿http://www.php.net/manual/en/function.is-null.php
Ïà¹ØÎĵµ£º
ÓÐÒ»¸ö¿ªÔ´ÏîÄ¿Ìṩ½«PHP´úÂëת»»³ÉScala´úÂëµÄ¹¦ÄÜ£¬¸ÃÏîÄ¿µÄÍøÕ¾ÊÇ http://code.google.com/p/php-to-scala-migration-helper/¡£
In short, php-to-scala converts PHP code to clean, maintainable Scala source code. To cut to the chase, see ConversionExamples, or the feature-by-feature DesignD ......
a:
ΪʲôҪʹÓûº´æ¼¼Êõ£¿ÀíÓɺܼòµ¥£ºÌá¸ßЧÂÊ¡£ÔÚ³ÌÐò¿ª·¢ÖУ¬»ñÈ¡ÐÅÏ¢µÄ·½Ê½Ö÷ÒªÊDzéѯÊý¾Ý¿â£¬³ý´ËÒÔÍ⣬Ҳ¿ÉÄÜÊÇͨ¹ýWeb Services»òÕß±ðµÄijÖÖ·½·¨£¬ÎÞÂÛÄÄÖÖ·½·¨£¬ÔÚ´óÁ¿µÄ²¢·¢·ÃÎÊÃæÇ°£¬ËüÃǶ¼¿ÉÄܳÉΪЧÂÊµÄÆ¿¾±£¬ÎªÁ˽â¾öÕâЩÎÊÌ⣬ÈËÃÇÌá³öÁ˺ܶà½â¾ö·½°¸£¬ÆäÖÐÒ» ЩÊÇÀûÓÃÓÅ»¯Èí¼þ£¨È磺APC£¬Eaccelerator£¬ ......
PHP£¬JavaºÍ.NETµÄ¹ýÈ¥£¬ÏÖÔÚºÍδÀ´
±¾ÎĶÔWeb±à³ÌÓïÑÔ½øÐÐÁËÒ»·ÌÖÂÛ£¬ÌÖÂ۵ĶÔÏóÖ÷ÒªÊÇPHP£¬JavaºÍ.NETƽ̨ÉϵÄVB.NETºÍC#¡£ÎÄÕ¶ÔËÄÖÖÓïÑÔÔÚWeb¿ª·¢ÉϵÄÌØµã½øÐÐÁ˼òÂÔµÄÃèÊö£¬²¢Ö÷ÒªÔÚÐÔÄÜ·½Ãæ½øÐÐÁ˱Ƚϡ£
¡¾51CTO¾«Ñ¡ÒëÎÄ¡¿PHP£¬JavaºÍ.NETÒѾ³ÉΪÁËδÀ´ÎåÄêÄÚ³ÌÐòÔ±±ØÐë¾ß±¸µÄ¼¼ÄÜ£¬¶øÕâÈýÖÖÓïÑÔ£¨»òÕß¿ÉÒÔ³ÆÖ®Î ......
×î½ü×öÁ˼¸¸öСÐ͵ÄÏîÄ¿£¬±È½Ï¼òµ¥£¬Ö»ÊÇÐèҪϸÐÄ£¬¶¼¿ÉÒÔÍê³É£¬Ö÷ÒªÊǶÔMVCģʽµÄÊìÁ·Ó¦Ó㬶ÔWEBÀ࿪·¢»¹ÊǺÜÓаïÖúµÄ¡£
¸Õ¿ªÊ¼µÄµÚÒ»¸öСÏîÄ¿£¬ÓÃÀ´Á·ÊÖ£¬È»ºóÎÒÈ«²¿ÊÇÁ÷³Ì»¯µÄ±à³Ì¡£´úÂëÒ²¾Í400ÐÐ×óÓÒ¡£½á¹ûÎҵĵ¼Ê¦£¬¾õµÃ´úÂë½á¹¹²»ÇåÎú£¬²»ÈÝÒ×
ά»¤£¬ÐèÒªÐ޸ġ£ÐèÒªÎÒ²ÉÓÃOOÀàµÄ±à³Ì·½Ê½½øÐиÄд¡£ÎÒÒÔǰдPHP£¬¼¸ ......
ÔÎÄת×Ô £ºhttp://home.phpchina.com/space.php?uid=49655&do=blog&id=182488
Ò»£® ±Ø±¸ÖªÊ¶
1.wsdl(web·þÎñ±ê¼ÇÓïÑÔ)
WSDL£¨ÍøÂç·þÎñÃèÊöÓïÑÔ£¬Web Services Description Language£©ÊÇÒ»ÃÅ»ùÓÚ XML
µÄÓïÑÔ£¬ÓÃÓÚÃèÊö Web Services ÒÔ¼°ÈçºÎ¶ÔËüÃǽøÐзÃÎÊ¡£
......