PHP
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/* ¡¾ÃuÃu¹aeÔo¡¿ */
³£Á¿Ãu Àa³£Á¿½¨ÒeÈ«´oд£¬µ¥´Ê¼aÓÃÏ»®Ïß*Ö¸o // MIN_WIDTH
±aÁ¿Ãu½¨ÒeÓÃÏ»®Ïß*½Ê½*Ö¸o // $var_name
º¯ÊýÃu½¨ÒeÓÃÍÕ*aÃuÃu*¨ // varName
¶¨½ç*u½¨ÒeÈ«´oд // <<<DING, <<<'DING'
ÎļþÃu½¨ÒeȫСдºÍÏ»®Ïß¡¢Êý×Ö // func_name.php
˽ÓÐÊoÐÔÃu¡¢*½*¨Ãu½¨Òe¼ÓÏ»®Ïß // private $_name _func
½Ó¿ÚÃu½¨Òe¼ÓI_ // interface I_Name
/* ÓiÑÔ½a¹¹ */
array(), echo(), empty(), eval(), exit(), isset(), list(), print(), unset()
echo, print ¿ÉÊ¡ÂÔÀ¨ºÅ¡£
/* Ô¤¶¨Òa³£Á¿ */
PATH_SEPARATOR //Â*¾¶*Ö¸o*u(WindowsΪ*ֺţ¬ÀaUnixΪðºÅ)
DIRECTORY_SEPARATOR //Ŀ¼*ָo*u
PHP_EOL //µ±Ç°ÏµÍ³µÄ»»ÐÐ*u
PHP_VERSION //PHP°ae±¾ºÅ
PHP_OS //PHP*þÎñ²Ù×÷ϵͳ
PHP_SAPI //ÓÃÀ´ÅжÏÊÇʹÓÃÃuÁiÐл¹ÊÇa¯ÀÀÆ÷Ö´Ðеģ¬Èç¹u PHP_SAPI=='cli' ±iʾÊÇÔÚÃuÁiÐÐÏÂÖ´ÐÐ
PHP_INT_MAX INT×i´oÖµ£¬32λƽ̨ʱֵΪ2147483647
PHP_INT_SIZE INT×Ö³¤£¬32λƽ̨ʱֵΪ4£¨4×Ö½Ú£(C)
M_PI //Ô²ÖÜÂÊÖµ
M_E //×ÔÈ»Êý
//PHPÔËÐл*¾³¼i²aº¯Êý
php_sapi_name() //*µ»ØÒ»¸oPHPÓeWEB*þÎñÆ÷½Ó¿ÚÀaÐ͵ÄСд×Ö*u´®
¸Ãº¯Êý*µ»ØÖµÓe³£Á¿PHP_SAPIÒ»Ö£¡
½Ó¿ÚÀaÐÍ£ºSAPI(the Server API, SAPI)
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/* ´oСдÎÊÌa */
- ÀaÃu¡¢*½*¨Ãu¡¢ÊoÐÔÃu¡¢º¯ÊýÃu£º²»Çø*Ö´oСд
- ±aÁ¿Ãu¡¢³£Á¿Ãu¡¢ÔªËØϱe£ºÇø*Ö´oСд
/* ¿É±a±eʶ*u */
¿É±a±aÁ¿ $i = 3; $k = 'i'; echo $$k; //Êa³o3
¿É±aº¯Êý function func() {echo 'hello!';} $i = 'func'; $i(); //Êa³ohello
¿É±aϱe $i = '1234'; $k = 3; echo $i[$k]; //Êa³o4
¿É±aÀaÃu class CLS{public $k = 'hello';} $i = 'CLS'; $j = new $i; echo $j->k;
¿É±aÊoÐÔ class CLS{public $k = 'hello';} $i = 'k'; $j = new CLS; echo $j->$i;
¿É±a*½*¨ class CLS{public function k(){echo 'hello';}} $i='k'; $j=new CLS; $j->$i();
/* ¿É±a±aÁ¿ */
* ÓÃÓÚÒµÎñÂß¼Åжϵõ½Ä³Ð(C)¾ßÌaÐÅÏ¢
$var_name = "class_name";
$$var_name = "PHP0913"; // $class_name = "PHP0913";$class_nameÒÑ´aeÈeÄÚ´aeÖÐ
var_dump($class_name); // var_dump($$var_name);
/* ±aÁ¿º¯Êý */
get_defined_vars //*µ»ØÓÉËuÓÐÒѶ¨Òa±aÁ¿Ëu×e³ÉµÄÊý×e(°uÀ¨»*¾³±aÁ¿¡¢*þÎñÆ÷±aÁ¿ºÍÓû§¶¨ÒaµÄ±aÁ¿)
/* unset() */
* unset()½oɾ³ýµ±Ç°±aÁ¿ÃuºÍÒýÓã¬ÆaÖµ²¢Î´±»É¾³ý
* ÒýÓô«µÝÖУ¬É¾³ýÒ»¸o±aÁ¿¼°ÆaÒýÓã¬ÆaËu±aÁ¿¼°ÒýÓþu´aeÔÚ£¬ÇÒÖµÒÀÈ»´aeÔÚ
echo "<br />";
$v3 = 'Öµ';
$v4 = &$v3;
unset($v4);
var_dump($v3, $v4);
/* ±aÁ¿µÄ×i³¤ÓÐЧÆÚ */
* µ±Ç°½Å±¾µÄÖ´ÐÐÖÜÆÚ£¬½Å±¾Ö´ÐнaÊø£¬±aÁ¿¼´Ïuʧ
/* Ô¤¶¨Òa±aÁ¿/³¬È«¾Ö±aÁ¿ */
$GLOBALS
$_COOKIE
$_ENV
$_FILES
$_GET
$_POST
$_REQUEST
$_SERVER
$_SESSION
/* ³£Á¿¶¨Òa */
define(³£Á¿Ãu, ³£Á¿Öµ, [Çø*Ö´oСд²ÎÊý]) //true±iʾ²»Çø*Ö/false±iʾÇø*Ö´oСд
const ³£Á¿Ãu = ³£Á¿Öµ // У¬½¨Òe
³£Á¿Ãu¿ÉÒÔʹÓÃÌØÊa×Ö*u
constant($name) // »ñÈ¡³£Á¿Ãu
// Àý£ºecho constant('-_-');
/* ³£Á¿Ïa¹Øº¯Êý */
defined
get_defined_constants
/* Ô¤¶¨Òa³£Á¿ */
__FILE__ ËuÔÚÎļþµÄ¾ø¶ÔÂ*¾¶
__LINE__ ÎļþÖеĵ±Ç°ÐкÅ
__DIR__ ÎļþËuÔÚĿ¼
__FUNCTION__ º¯ÊýÃu³Æ
__CLASS__ ÀaµÄÃu³Æ
__METHOD__ ÀaµÄ*½*¨Ãu
__NAMESPACE__ µ±Ç°ÃuÃu¿Õ¼aµÄÃu³Æ
/* ÕuÐÍ */
ÕuÐÍÕ¼ÓÃ4×Ö½Ú£¬¹²4*8=32룬×i´oֵΪ2147483647£¬×iСֵΪ-2147483648£¬×iСֵµÄ¾ø¶ÔÖµ±È×i´oÖµµÄ´o1
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/* ½øÖÆת»»º¯Êý */
Ö»ÄÜÊ®½øÖÆÓeÆaËu½øÖƽøÐÐת»»£¬Ö»ÓÐÁuÖÖ
ת»»Ê±£¬²ÎÊýÓ¦ÊÇ×Ö*u´®£¨¼´²»¿Éº¬°Ë½øÖƵġ°0¡±»oÊ®Áu½øÖƵġ°0x¡±£(C)
dec
bin
oct
hex
hexdec() Ê®Áu½øÖÆתʮ½øÖÆ Ò²¿Éдhex2dec()
dechex() Ê®½øÖÆתʮÁu½øÖÆ Ò²¿Éдdec2hex()
bindec() ¶þ½øÖÆתʮ½øÖÆ Ò²¿Éдbin2dec()
decbin() Ê®½øÖÆת¶þ½øÖÆ Ò²¿Éдdex2bin()
octdec() °Ë½øÖÆתʮ½øÖÆ Ò²¿Éдoct2dec()
decoct() Ê®½øÖÆת°Ë½øÖÆ Ò²¿Éдdec2oct()
/* ¸¡µaÊý */
¸¡µaÊý²»ÄܱȽϴoС £¡£¡£¡
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/* µ¥ÒýºÅ×Ö*u´® */
µ¥ÒýºÅ×Ö*u´®ÖУ¬Ö»ÄÜתÒa*´Ð±¸ÜºÍµ¥ÒýºÅ
/* Ë«ÒýºÅ×Ö*u´® */
Ö»½aÎo×Ö*u´®Ò»´Î £¡£¡£¡
eval °Ñ×Ö*u´®×÷ΪPHP´uÂeÖ´ÐÐ
´oÀ¨ºÅ°u¹u±aÁ¿£¬¿ÉÈ*¶¨±aÁ¿Ãu½çÏÞ¡£È磺"aaa{$bbb}ccc"
Ë«ÒýºÅÖпÉÒÔ½«ASCIIÂeת»»Îª×Ö*u
"\x61" -> a // ×Ö*u´®Öв»Ðe0£¬ÕuÐÍÖвÅÊÇ0xÇ°µ¼
"\x49\x54\x43\x41\x53\x54" -> ITCAST
½«ASCIIת³É×Ö*uº¯Êýchr()
½«×Ö*uת³ÉASCIIº¯Êýord()
#Ë«ÒýºÅתÒaÁбi
\n »»ÐÐ
\r »Ø³µ
\t ˮƽÖƱi*u
\\ *´Ð±Ïß
\$ ÃÀÔª±e¼Ç
\v ´¹Ö±ÖƱi*u
\e Escape
\f »»Ò³
\" Ë«ÒýºÅ"
\[0-7]{1,3} *uºÏ¸ÃÕýÔo±i´iʽÐoÁеÄÊÇÒ»¸oÒ԰˽øÖÆ*½Ê½À´±i´iµÄ×Ö*u
\x[0-9A-Fa-f]{1,2} *uºÏ¸ÃÕýÔo±i´iʽÐoÁеÄÊÇÒ»¸oÒÔÊ®Áu½øÖÆ*½Ê½À´±i´iµÄ×Ö*u
/* ¶¨½ç*u */
herodoc - ¹¦ÄÜͬ˫ÒýºÅ£¬ÄܽaÎo
$str = <<<AAA
×Ö*u´®ÄÚÈÝ
AAA;
nowdoc - ¹¦ÄÜͬµ¥ÒýºÅ£¬²»ÄܽaÎo
Ö»ÔÚ¿ªÊ¼Î»ÖÃÓе¥ÒýºÅ
$str = <<<'AAA'
×Ö*u´®ÄÚÈÝ
AAA;
/* ×Ö*u´®µÄʹÓà */
¿É½«×Ö*u´®µ±×÷Ò»¸o×Ö*uµÄ¼¯ºÏÀ´Ê¹Ó㬿ɶÀÁ¢*ÃÎÊÿ¸o×Ö*u¡£½oÊÊÓÃÓÚµ¥×Ö½Ú×Ö*u£¨×Öĸ¡¢Êý×Ö¡¢°e½Ç±eµa*uºÅ£(C)£¬ÏñÖÐÎĵȲ»¿ÉÓÃ
$str = "abcd";
echo $str[3]; // d
echo $str{0}; // a
/* ¡¾ÀaÐͲÙ×÷º¯Êý¡¿ */
//»ñÈ¡/ÉeÖÃÀaÐÍ
gettype($var) //»ñÈ¡±aÁ¿µÄÊý¾ÝÀaÐÍ
settype($var, $type) //ÉeÖñaÁ¿µÄÊý¾ÝÀaÐÍ
//ÀaÐÍÅжÏ
is_int
is_float
is_null
is_string
is_resource
is_array
is_bool
is_object
is_numeric ¼i²a±aÁ¿ÊÇ*ñΪÊý×Ö»oÊý×Ö×Ö*u´®
//ת»»³ÉÖ¸¶¨µÄÊý¾ÝÀaÐÍ
boolval
floatval
intval
strval
//Ç¿ÖÆת»»ÀaÐÍ
(int)
(float)
(string)
(bool)
(array)
(object)
(unset) //ת»»ÎªNULL
(binary) ת»»ºÍ bǰ׺ת»» //ת»»³É¶þ½øÖÆ
var_dump ´oÓ¡±aÁ¿µÄÏa¹ØÐÅÏ¢¡£
ÏÔʾ¹ØÓÚÒ»¸o»o¶a¸o±i´iʽµÄ½a¹¹ÐÅÏ¢£¬°uÀ¨±i´iʽµÄÀaÐÍÓeÖµ¡£
Êý×e½«µÝ¹eÕ¹¿ªÖµ£¬Í¨¹ýËo½øÏÔʾÆa½a¹¹¡£
var_export($var [,bool $return]) //Êa³o»o*µ»ØÒ»¸o±aÁ¿µÄ×Ö*u´®±iʾ
$return£ºÎªtrue£¬Ôo*µ»Ø±aÁ¿Ö´ÐкoµÄ½a¹u
print_r ´oÓ¡¹ØÓÚ±aÁ¿µÄÒ×ÓÚÀi½aµÄÐÅÏ¢
empty ¼i²eÒ»¸o±aÁ¿ÊÇ*ñΪ¿Õ
isset ¼i²a±aÁ¿ÊÇ*ñ´aeÔÚ
/* ¡¾Á÷³Ì¿ØÖÆ¡¿ */
//ifÓi¾aµÄÌae´uÓi*¨
if (Ìo¼þÅжÏ) :
Ói¾a¿e;
elseif (Ìo¼þÅжÏ) :
Ói¾a¿e;
else :
Ói¾a¿e;
endif;
//Á÷³Ì¿ØÖƵÄÌae´uÓi*¨
ÔÚǶÈeHTMLʱ³£ÓÃ
½« { »»³É : , ½« } »»³É endif; µÈ
endif
endwhile
endfor
endforeach
endswitch
/* ¡¾switch¡¿ */
switch (Ìo¼þ) {
case ״ֵ̬1:
Ói¾a¿e;
[break;]
case ״ֵ̬2:
Ói¾a¿e;
[break;]
case ״ֵ̬3:
case ״ֵ̬4:
Ói¾a¿e;
[break;]
default:
Ói¾a¿e;
[break;]
}
switchÊÇ״̬*ÖÖ§£¬ÌØÊaµÄÑ»*
ÏȼÆËa³o״ֵ̬£¬ÔÙÈ¥ÓeÅжÏÊý×÷±È½Ï
breakÍ˳oÁ÷³Ì
/* ¡¾forÑ»*¡¿ */
for (Ìo¼þ³oʼ»¯±i´iʽ; Ìo¼þÅжϱi´iʽ; Ìo¼þ±a»¯±i´iʽ) {
Ñ»*Ìa
}
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b. Ìo¼þÅжϱi´iʽ±»Ê¡ÂÔʱ£¬±iʾѻ*ΪÕae£¬½øÈeËÀÑ»*
c. Ìo¼þ±a»¯±i´iʽ±»Ê¡ÂÔʱ£¬¿ÉÒÔÔÚÑ»*ÌaÄÚÍe³É
4. ÿ¸o±i´iʽ¾u¿ÉÓɶaÌoÓi¾a×e³É£¬Ã¿ÌoÓi¾aÖ®¼aʹÓöººÅ*Ö¸i
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5. forÖ»ÄܱeÀuÊýÖµÐÍË÷ÒýϱeÊý×e
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6. Ó¦¸Ã½«¿ÉÒÔ³oʼ»¯µÄÓi¾a¾u*ÅÔÚÌo¼þ³oʼ»¯±i´iʽÄÚ£¬ÕaÑu¿ÉÒÔÊ¡È¥ºÜ¶aÖ´ÐдÎÊý
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goto a;
echo 'Foo';
a:
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/* ¡¾Îļþ¼ÓÔØ¡¿ */
require / include / require_once / include_once
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- ×Ô¶¯¼ÓÔØʹÓõ½µÄÀaÃuÎļþ£¨¸u¾ÝÀaÃuÕÒÏaÓ¦Ãu³ÆµÄÎļþ£¬¹ÊÐeÀaÃuÓeÀaÎļþÃuÒ»Ö£(C)
- ÿ¸oÐeÒª¼ÓÔØÀaµÄÎļþ¶¼ÐeÒª´aeÔÚ__autoloadº¯Êý
- ½«__autoloadº¯ÊýдÈeµ¥¶ÀµÄÎļþ£¬Ã¿¸oÐeÒªÓõ½ÀaµÄÎļþÔÙrequire¸Ãº¯ÊýÎļþ
- __autoload ²ÎÊýÊÇÀaÃu
function __autoload($class_name) {
require_once $_SERVER["DOCUMENT_ROOT"] . "/class/$class_name.php";
}
// $_SERVER["DOCUMENT_ROOT"] µ±Ç°ÔËÐнű¾ËuÔÚµÄÎĵµ¸uĿ¼
- ¿ÉÒÔͨ¹ýÀaÃu£¬À´ÍƵ¼³oÀaËuÔÚµÄÎļþÃu£¡
- Èç¹uÒ»¸oÏiÄ¿´aeÔÚ¶a¸o×Ô¶¯¼ÓÔغ¯Êýʱ£¬¶¨ÒaÒ»¸o¿ÉÒÔÍe³É¼ÓÔصÄÆÕͨº¯Êý£¬²¢ÔÚº¯Êý֮ǰʹÓÃspl_autoload_register×¢²a¸Ãº¯Êý¡£
# spl_autoload_register
- ×¢²a__autoload()º¯Êý
bool spl_autoload_register ([ callback $autoload_function ] )
- ¿ÉÒÔ×¢²a¶a¸o×Ô¶¯¼ÓÔغ¯Êý£¬ÏÈ×¢²aµÄÏÈÖ´ÐÐ
- Ò»µ(C)×¢²a×Ô¶¯¼ÓÔغ¯Êý£¬__autoload¾ÍʧЧ¡£
- ×¢²aº¯Êýʱ£¬²ÎÊýΪº¯ÊýÃu£¨×¢Òa¼ÓÒýºÅ£(C)£»×¢²a*½*¨Ê±£¬²ÎÊýΪÊý×e
# ×¢²aÀa»o¶ÔÏoµÄ*½*¨Îª×Ô¶¯¼ÓÔØ*½*¨Ê±£¬²ÎÊýÐeΪÊý×e£º
spl_autoload_register(array(__CLASS__, '__autoload'));
__CLASS__±iʾµ±Ç°ÀaÃu£¬ÈoÊǶÔÏo¿ÉÓÃ$this£¬Ïeϸ¼uÊÖ²a
// ÐoÁл¯£¨´®Ðл¯£(C)
# Êý¾Ý´«Êa¾uÊÇ×Ö*u´®ÀaÐÍ
# ³ýÁË×ÊÔ´ÀaÐÍ£¬¾u¿ÉÐoÁл¯
# ÐoÁл¯ÔÚ´ae*ÅÊý¾Ýʱ£¬»a´ae*ÅÊý¾Ý±¾Éi£¬Ò²»a´ae*ÅÊý¾ÝÀaÐÍ
×÷Óãº1.ÔÚÍøÂç´«ÊaÊý¾Ýʱ£»2.ΪÁ˽«Êý×e»o¶ÔÏo*ÅÔÚ´ÅÅÌʱ
# ÐoÁл¯
serialize ²uÉuÒ»¸o¿É´ae´¢µÄÖµµÄ±iʾ
string serialize ( mixed $value )
- *µ»Ø×Ö*u´®£¬´Ë×Ö*u´®°uº¬Á˱iʾvalueµÄ×Ö½ÚÁ÷£¬¿ÉÒÔ´ae´¢ÓÚÈκεØ*½¡£
- ÓÐÀuÓÚ´ae´¢»o´«µÝ PHP µÄÖµ£¬Í¬Ê±²»¶ªÊ§ÆaÀaÐͺͽa¹¹¡£
# *´ÐoÁл¯
unserialize ´ÓÒÑ´ae´¢µÄ±iʾÖд´½¨PHPµÄÖµ
mixed unserialize ( string $str [, string $callback ] )
- ¶Ôµ¥Ò»µÄÒÑÐoÁл¯µÄ±aÁ¿½øÐвÙ×÷£¬½«Æaת»»»ØPHPµÄÖµ¡£
# ÎļþµÄ¶Áд²Ù×÷
- file_put_contents ½«Ò»¸o×Ö*u´®Ð´ÈeÎļþ
int file_put_contents($file, $data [,$flags])
$flags£ºFILE_USE_INCLUDE_PATH(¸²¸Ç)£¬FILE_APPEND(×*¼Ó)
- file_get_contents ½«Õu¸oÎļþ¶ÁÈeÒ»¸o×Ö*u´®
string file_get_contents($file [, bool $use_include_path [,int $offset [,int $maxlen]]])
# ¶ÔÏoÐoÁл¯
- Ö»ÄÜÐoÁл¯¶ÔÏoÄÚ²¿µÄÊý¾Ý£¬¼´*Ǿ²Ì¬ÊoÐÔ¡£
# ÐeÔÚ*´ÐoÁл¯¶ÔÏo֮ǰ¼ÓÔØÀa£¬Ò²¿ÉÒÔ´¥*¢×Ô¶¯¼ÓÔØ»uÖÆ¡£
__sleep ÐoÁл¯ÐeÐoÁл¯µÄÊoÐÔ¡£
- Ìa½»Î´Ìa½»µÄÊý¾Ý£¬»oÀaËƵÄÇaÀi²Ù×÷£¬²¿*Ö´®Ðл¯¶ÔÏo¡£
- *µ»ØÒ»¸o°uº¬¶ÔÏoÖÐËuÓÐÓ¦±»ÐoÁл¯µÄ±aÁ¿Ãu³ÆµÄÊý×e
__wakeup *´ÐoÁл¯Ê±£¬Ô¤ÏÈ×¼±¸¶ÔÏoÐeÒªµÄ×ÊÔ´
- ÖØн¨Á¢Êý¾Ý¿aÁ¬½Ó£¬»oÖ´ÐÐÆaËu³oʼ»¯²Ù×÷
public function __sleep() {
return array('server', 'username', 'password', 'db');
}
public function __wakeup() {
$this->connect();
}
// ¶ÔÏo¼Ì³Ð
class ×ÓÀaÃu extends ¸¸Àa {}
Èç¹uÒ»¸o¶ÔÏoÊÇ×ÓÀaµÄ¶ÔÏo£¬ÄÇôͬʱҲÊǸ¸ÀaµÄ¶ÔÏo¡£
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instanceof ÅжÏij¶ÔÏoÊÇ*ñΪijÀaµÄ¶ÔÏo
¶ÔÏoÃu instanceof ÀaÃu
// *ÃÎÊ¿ØÖÆ
public ¹«Óеģ¨¼Ì³ÐÁ´¡¢±¾Àa¡¢Ía²¿¾u¿É*ÃÎÊ£(C)
protected ±£»¤µÄ£¨½o¼Ì³ÐÁ´¡¢±¾Àa¿É*ÃÎÊ£(C)
private ˽Óеģ¨½o±¾Àa¿É*ÃÎÊ£(C)
¸u¾Ý³ÉÔ±¶¨ÒaλÖá¢*ÃÎÊλÖÃÅжϡ£
# ¼aeÈÝÐÔÎÊÌa
- ÉuÃ÷ÊoÐÔʱ£¬var¹Ø¼u×ÖÉuÃ÷µÄĬÈÏΪpublicȨÏÞ
- ÉuÃ÷*½*¨Ê±£¬Ê¡ÂÔ*ÃÎÊÐÞÊÎ*u£¬Ä¬ÈÏΪpublicȨÏÞ
// ÖØд override
$this´u±i±¾¶ÔÏo£¬±»Ëµ÷Ó㬾ʹu±iÄĸo¶ÔÏo¡£
- ¼Ì³Ðʱ£¬×ÓÀa³ÉÔ±ÃuÓÚ¸¸Àa³ÉÔ±Ãu*¢Éu³aÍ»£¬Ôo×ÓÀa³ÉÔ±»aÖØд¸¸Àa³ÉÔ±¡£
- ÊoÐÔºÍ*½*¨¾u¿É±»×ÓÀaÖØд¡£
- µ±¸¸ÀaµÄ*½*¨»oÊoÐÔÒѾ²»Âu×a×ÓÀaµÄÐeÇo£¬ÔoÐeÒªÖØд¡£
- Ò²¿ÉÄÜÒoΪÃuÃu²»¹ae*¶µ¼ÖÂÖØд¡£
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# ÖØдÏÞÖÆ
*ÃÎÊÏÞÖÆ£º
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*½*¨²ÎÊýÏÞÖÆ£º
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# $thisÈ*¶¨ÔÔo
$thisΪµ÷ÓøÃ*½*¨µÄ¶ÔÏo£¬±iʾ¸Ã*½*¨µÄÖ´Ðл*¾³¶ÔÏo¡£
- ¶ÔÏoµ÷ÓÃ
- »*¾³µÄ´«µÝ¡£Èç¹uµ±Ç°µ÷ÓÃʱ£¬²»ÄÜÈ*¶¨$thisµÄÖµ(¾²Ì¬µ÷ÓÃ)£¬´Ëʱ¾²Ì¬µ÷ÓÃËu´¦¶ÔÏo»*¾³»a´«µÝµ½±»µ÷ÓõÄ*½*¨ÄÚ¡£
$this²¢*ÇÓÀÔ¶´u±i±¾¶ÔÏo£¬¶øÊÇÓÉ*½*¨µÄÖ´Ðл*¾³¾o¶¨¡£
# final
Èç¹u¸¸ÀaÖеÄ*½*¨±»ÉuÃ÷Ϊfinal£¬Ôo×ÓÀaÎÞ*¨¸²¸Ç£¨ÖØд£(C)¸Ã*½*¨¡£
Èç¹uÒ»¸oÀa±»ÉuÃ÷Ϊfinal£¬Ôo²»Äܱ»¼Ì³Ð¡£
µ«¼ÓÓÐfinal¹Ø¼u×ÖµÄÀaÒÀ¾ÉÄܱ»ÊµÀý»¯£¡
# ³eÏoÀa
¹Ø¼u×Ö£ºabstract
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- ³eÏoÀaµÄ×ÓÀaÖеÄÆÕͨ*½*¨Ö´ÐÐ*½Ê½ºÍÆaËuÀaÏaͬ¡£
- ×÷Óãº
1. ¼Ì³Ð£¬ÎªÀ(C)Õ¹Àa£¬Í³Ò»¹«¹²²Ù×÷¡£
2. ÏÞÖƽa¹¹£¨¹ae*¶£(C)¡£¹ae*¶×ÓÀaµÄ½a¹¹¡£
// ½Ó¿Ú
¹Ø¼u×Ö£ºinterface
- ¶ÔÏoÌa¹(C)µÄÓe¶ÔÏo½»»¥µÄ*½Ê½¾ÍÊǽӿڡ£
- ʹÓýӿڿÉÒÔÖ¸¶¨Ä³¸oÀa±ØÐeʵÏÖÄÄÐ(C)*½*¨£¬µ«²»ÐeÒª¶¨ÒaÕaÐ(C)*½*¨µÄ¾ßÌaÄÚÈÝ¡£
- ͨ¹ýinterfaceÀ´¶¨ÒaÒ»¸o½Ó¿Ú£¬¾ÍÏñ¶¨ÒaÒ»¸o±e×¼µÄÀaÒ»Ñu£¬µ«ÆaÖж¨ÒaËuÓеÄ*½*¨¶¼Êǿյġ£
- ½Ó¿ÚÖж¨ÒaµÄËuÓÐÊoÐÔºÍ*½*¨¶¼±ØÐeÊÇpublic£¬¿ÉÊ¡ÂÔpublic¹Ø¼u×Ö¡£
- ½Ó¿ÚÖÐÒ²¿ÉÒÔ¶¨Òa³£Á¿(const)¡£½Ó¿Ú³£Á¿ºÍÀa³£Á¿µÄʹÓÃÍeÈ«Ïaͬ¡£
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- ½Ó¿Ú²»Äܶ¨ÒaÊoÐÔ£¡
# ¶¨Òa½Ó¿Ú
interface ½Ó¿ÚÃu {
½Ó¿ÚÄÚÈÝ£¨¹«¹²*½*¨ÉuÃ÷µÄ¼¯ºÏ£(C)
}
# ½Ó¿ÚʵÏÖ
- ҪʵÏÖÒ»¸o½Ó¿Ú£¬¿ÉÒÔʹÓÃimplements²Ù×÷*u¡£
- ÀaÖбØÐeʵÏÖ½Ó¿ÚÖж¨ÒaµÄËuÓÐ*½*¨£¬*ñÔo»a±¨Ò»¸ofatal´iÎo¡£
- Èç¹uҪʵÏÖ¶a¸o½Ó¿Ú£¬¿ÉÒÔÓöººÅÀ´*Ö¸o¶a¸o½Ó¿ÚµÄÃu³Æ¡£
- ʵÏÖ¶a¸o½Ó¿Úʱ£¬½Ó¿ÚÖеÄ*½*¨²»ÄÜÓÐÖØÃu¡£
- ½Ó¿ÚÒ²¿ÉÒԼ̳У¬Í¨¹ýʹÓÃextends²Ù×÷*u¡£
class ÀaÃu implements ½Ó¿ÚÃu {
½Ó¿Ú*½*¨µÄʵÏÖ
}
# ×¢Òa
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2. ÀaÓe³eÏoÀaÊǵ¥¼Ì³Ð£¬ÀaÓe½Ó¿ÚÊǶaʵÏÖ¡£
3. ½Ó¿Ú²»ÊÇÀa£¬ÏÞÖÆÀaµÄ½a¹¹¡£
4. ½Ó¿ÚÓe½Ó¿ÚÖ®¼aÊǶa¼Ì³Ð¡£ÓÃextends¹Ø¼u×Ö¡£
interface I_C extends I_A, I_B {}
// ¾²Ì¬ÑÓ³Ù°o¶¨
self::£¬´u±i±¾Àa(µ±Ç°´uÂeËuÔÚÀa)
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¼´£¬×ÓÀaµ÷Óø¸Àa*½*¨£¬selfÈ´²»´u±iµ÷ÓõÄ×ÓÀa¡£
static::£¬´u±i±¾Àa(µ÷ÓøÃ*½*¨µÄÀa)
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ÔËÐÐʱ£¬²ÅÈ*¶¨´u±iµÄÀa¡£
static::²»ÔÙ±»½aÎoΪ¶¨Òaµ±Ç°*½*¨ËuÔÚµÄÀa£¬¶øÊÇÔÚʵ¼ÊÔËÐÐʱ¼ÆËaµÄ¡£
// ¶ÔÏoµÄ±eÀu£¨µu´u£(C)
- ¶ÔÏoͨ¹ýÊoÐÔ±£´aeÊý¾Ý£¬¹Ê±eÀu¶ÔÏoµÄÊoÐÔ¡£
- foreachÓiÑÔ½a¹¹£¬»ñµÃÊoÐÔÃuºÍÊoÐÔÖµ¡£
foreach ($obj as $p_name => $p_value) {}
# ×Ô¶¨Òa±eÀu(µu´uÆ÷Iterator)
Iterator - ¿ÉÔÚÄÚ²¿µu´u×Ô¼ºµÄÍa²¿µu´uÆ÷»oÀaµÄ½Ó¿Ú
Iterator::current ¡ª *µ»Øµ±Ç°ÔªËØ
Iterator::key ¡ª *µ»Øµ±Ç°ÔªËصļu
Iterator::next ¡ª ÏoÇ°Òƶ¯µ½ÏÂÒ»¸oÔªËØ
Iterator::rewind ¡ª *µ»Øµ½µu´uÆ÷µÄµÚÒ»¸oÔªËØ
Iterator::valid ¡ª ¼i²eµ±Ç°Î»ÖÃÊÇ*ñÓÐЧ
# ¶ÔÏoµÄ¿Ë¡
//¶ÔÏoÖ®¼aµÄ´«ÖµÊÇ[ÒýÓÃ]´«µÝ¡£
¿Ë¡£ºÐ¶ÔÏo = clone ¾É¶ÔÏo
- ËuÓеÄÒýÓÃÊoÐÔÈÔÈ»»aÊÇÒ»¸oÖ¸ÏoÔÀ´µÄ±aÁ¿µÄÒýÓá£
__clone()*½*¨ÔÚ¶ÔÏo±»¿Ë¡ʱ×Ô¶¯µ÷Óá£
×¢Òa£º¹¹Ôi*½*¨¶ÔӦʵÀý»¯(new)£¬¿Ë¡*½*¨¶ÔÓ¦¿Ë¡(clone)¡£
// µ¥Àýģʽ
#Èý˽һ¹«
µ¥Àýģʽ£¨Singleton£(C)ÓÃÓÚΪһ¸oÀaÉu³ÉÒ»¸oΨһµÄ¶ÔÏo¡£×i³£ÓõĵØ*½ÊÇÊý¾Ý¿aÁ¬½Ó¡£Ê¹Óõ¥ÀýģʽÉu³ÉÒ»¸o¶ÔÏoºo£¬¸Ã¶ÔÏo¿ÉÒÔ±»ÆaËuÖÚ¶a¶ÔÏoËuʹÓá£
# *ÀÖ¹Ò»¸oÀa±»ÊµÀý»¯¶a´Î
class MySQLDB {
private static $instance = null; // ´aeÀaʵÀýÔÚ´ËÊoÐÔÖÐ
// ¹¹Ôi*½*¨ÉuÃ÷Ϊprivate£¬*ÀÖ¹Ö±½Ó´´½¨¶ÔÏo
private function __construct() {}
public static function getInstance() {
if(! self::$instance instanceof static) {
self::$instance = new static;
}
return self::$instance;
}
private function __clone() {} // ×eÖ¹Óû§¸´ÖƶÔÏoʵÀý
}
// ħÊo*½*¨
__construct ¹¹Ôi*½*¨
__destruct Îo¹¹*½*¨
__clone ¿Ë¡¶ÔÏo
__sleep ÐoÁл¯¶ÔÏo
__wakeup *´ÐoÁл¯¶ÔÏo
__autoload ×Ô¶¯¼ÓÔØ£¬Ê¹ÓÃÀaµ«Î´ÕÒµ½Ê±
__toString ¶ÔÏo±»µ±×÷×Ö*u´®Ê¹ÓÃʱ
__invoke µ±³¢ÊÔÒÔµ÷Óú¯ÊýµÄ*½Ê½µ÷ÓÃÒ»¸o¶ÔÏoʱ
# ÖØÔØ overload
Ö¸¶¯Ì¬µØ"´´½¨"ÀaÊoÐÔºÍ*½*¨
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# ÊoÐÔÖØÔØ
- ´¦Ài²»¿É*ÃÎʵÄÊoÐÔ
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# ÊoÐÔÖØÔضÔÓÚ¾²Ì¬ÊoÐÔÎÞЧ
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__set ÔÚ¸ø²»¿É*ÃÎʵÄÊoÐÔ¸³ÖµÊ±
public void __set(string $name, mixed $value)
×÷ÓãºÅuÁ¿¹ÜÀi˽ÓÐÊoÐÔ£¬¼a½Ó±£»¤¶ÔÏo½a¹¹
__get ¶ÁÈ¡²»¿É*ÃÎʵÄÊoÐÔµÄֵʱ
public mixed __get(string $name)
__isset µ±¶Ô²»¿É*ÃÎʵÄÊoÐÔµ÷ÓÃisset()»oempty()ʱ
public bool __isset(string $name)
__unset µ±¶Ô²»¿É*ÃÎʵÄÊoÐÔµ÷ÓÃunset()ʱ
public void __unset(string $name)
# *½*¨ÖØÔØ
- ´¦Ài²»¿É*ÃÎʵÄ*½*¨
__call µ±µ÷ÓÃÒ»¸o²»¿É*ÃÎʵÄ*Ǿ²Ì¬*½*¨£¨Èç䶨Òa£¬»oÕß²»¿É¼u£(C)ʱ×Ô¶¯±»µ÷ÓÃ
public mixed __call(string $name, array $arguments)
__callStatic µ±ÔÚµ÷ÓÃÒ»¸o²»¿É*ÃÎʵľ²Ì¬*½*¨£¨Èç䶨Òa£¬»oÕß²»¿É¼u£(C)ʱ×Ô¶¯±»µ÷ÓÃ
public static mixed __callStatic(string $name, array $arguments)
# $name²ÎÊýÊÇÒªµ÷ÓõÄ*½*¨Ãu³Æ¡£$arguments²ÎÊýÊÇÒ»¸oÊý×e£¬°uº¬×ÅÒª´«µÝ¸ø*½*¨µÄ²ÎÊý¡£
// ÀaÐÍÔ¼Êø
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// Èý´oÌØÐÔ
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// ÀaÓe¶ÔÏo¡¤¹Ø¼u×Ö
this ´u±i±¾¶ÔÏo
public ¹«Óеģ¨¼Ì³ÐÁ´¡¢±¾Àa¡¢Ía²¿¾u¿É*ÃÎÊ£(C)
protected ±£»¤µÄ£¨½o¼Ì³ÐÁ´¡¢±¾Àa¿É*ÃÎÊ£(C)
private ˽Óеģ¨½o±¾Àa¿É*ÃÎÊ£(C)
parent:: ´u±i¸¸Àa
self:: ´u±i±¾Àa(µ±Ç°´uÂeËuÔÚÀa)
static:: ´u±i±¾Àa(µ÷ÓøÃ*½*¨µÄÀa)
static ¾²Ì¬³ÉÔ±£¨ÊoÐÔ¡¢*½*¨£(C)£¬ËuÓжÔÏo¾u¿ÉʹÓã¬Ía²¿Ò²¿ÉÖ±½ÓʹÓûoÐ޸ģ¬¾²Ì¬*½*¨²»¿É*ÃÎÊ*Ǿ²Ì¬³ÉÔ±
final *½*¨ÓÃfinal²»¿É±»×ÓÀaÖØÔØ£¬ÀaÓÃfinal²»¿É±»¼Ì³Ð£¨*½*¨¡¢Àa£(C)
const Àa³£Á¿£¨ÊoÐÔ£(C)
abstract ³eÏoÀa
interface ½Ó¿Ú
extends Àa¼Ì³Ð(×ӽӿڼ̳нӿڡ¢ÆaËuÆÕͨÀa¼Ì³Ð)
implements ½Ó¿ÚʵÏÖ£¨ÀaʵÏÖ½Ó¿Ú¡¢³eÏoÀaʵÏÖ½e¿Ú£(C)£¨¶Ô½Ó¿ÚµÄʵÏֺͼ̳оu¿ÉÓжa¸o£(C)
Iterator ÄÚÖýӿڣ¨µu´u£(C)
clone ¿Ë¡
instance ʵÀý
instanceof ij¶ÔÏoÊÇ*ñÊoÓÚijÀa
/* ¡¾ÀaÓe¶ÔÏoÏa¹Øº¯Êý¡¿ */
class_alias([$original [,$alias]]) ¸øÀaÈ¡±ðÃu
class_exists($class [,$autoload]) ¼i²eÀaÊÇ*ñÒѶ¨Òa
interface_exists($interface [,$autoload]) ¼i²e½Ó¿ÚÊÇ*ñÒѱ»¶¨Òa
method_exists($obj, $method)¼i²eÀaµÄ*½*¨ÊÇ*ñ´aeÔÚ
property_exists($class, $property) ¼i²e¶ÔÏo»oÀaÊÇ*ñ¾ßÓиÃÊoÐÔ
get_declared_classes(void) *µ»ØÓÉÒѶ¨ÒaÀaµÄÃu×ÖËu×e³ÉµÄÊý×e
get_declared_interfaces(void) *µ»ØÒ»¸oÊý×e°uº¬ËuÓÐÒÑÉuÃ÷µÄ½Ó¿Ú
get_class([$obj]) *µ»Ø¶ÔÏoµÄÀaÃu
get_parent_class([$obj]) *µ»Ø¶ÔÏo»oÀaµÄ¸¸ÀaÃu
get_class_methods($class) *µ»ØÓÉÀaµÄ*½*¨Ãu×e³ÉµÄÊý×e
get_object_vars($obj) *µ»ØÓɶÔÏoÊoÐÔ×e³ÉµÄ¹ØÁªÊý×e
get_class_vars($class) *µ»ØÓÉÀaµÄĬÈÏÊoÐÔ×e³ÉµÄÊý×e
is_a($obj, $class) Èç¹u¶ÔÏoÊoÓÚ¸ÃÀa»o¸ÃÀaÊǴ˶ÔÏoµÄ¸¸ÀaÔo*µ»ØTRUE
is_subclass_of($obj, $class) Èç¹u´Ë¶ÔÏoÊǸÃÀaµÄ×ÓÀa£¬Ôo*µ»ØTRUE
get_object_vars($obj) *µ»ØÓɶÔÏoÊoÐÔ×e³ÉµÄ¹ØÁªÊý×e
// ³£ÓÃÀa
# PHPÊÖ²a -> Ô¤¶¨ÒaÀa
Closure ±Õ°uÀa£¬ÄaÃuº¯Êý¶ÔÏoµÄfinalÀa
stdClass ±e×¼Àa£¬Í¨³£ÓÃÓÚ¶ÔÏoÀa±£´ae¼¯ºÏÊý¾Ý
__PHP_Incomplete_Class ²»ÍeÕuÀa£¬µ±Ö»ÓжÔÏo¶øûÓÐÕÒµ½Àaʱ£¬Ôo¸Ã¶ÔÏo±»ÈÏΪÊǸÃÀaµÄ¶ÔÏo
Exception Òi³£Àa
PDO Êý¾Ý¶ÔÏoÀa
// ħÊo³£Á¿
__DIR__ ÎļþËuÔÚµÄĿ¼
__LINE__ ÎļþÖеĵ±Ç°ÐкÅ
__FILE__ ÎļþµÄÍeÕuÂ*¾¶£¨¾ø¶ÔÂ*¾¶£(C)ºÍÎļþÃu
__CLASS__ ÀaµÄÃu³Æ
__METHOD__ ÀaµÄ*½*¨Ãu£¬°uº¬ÀaÃuºÍ*½*¨Ãu
__FUNCTION__ º¯ÊýÃu³Æ£¬ÓÃÔÚ*½*¨ÄÚÖ»±iʾ*½*¨Ãu
// *´Éa»uÖÆ Reflection
×÷Óãº1. »ñÈ¡½a¹¹ÐÅÏ¢ 2. ´uÀiÖ´ÐÐ
ReflectionClass ±¨¸aeÒ»¸oÀaµÄÓйØÐÅÏ¢
ReflectionMethod ±¨¸aeÒ»¸o*½*¨µÄÓйØÐÅÏ¢
ReflectionClass::export Êa³oÀa½a¹¹±¨¸ae
# ´uÀiÖ´ÐÐ
ʵÀý»¯ ReflectionFunction ÀaµÄ¶ÔÏo
$f = new ReflectionFunction('func'); // funcΪº¯Êýfunc($p)
$f->invoke('param');
/* Ò³ÃaeÌøת */
// PHP
header('Loacation: url')
header()Ö´ÐÐÍe±Ïºo£¬ºoÃaeµÄ´uÂeÒ²»a¼ÌÐøÖ´ÐУ¬¹ÊÐeÔÚ¸ÃÓi¾aºo¼Ódie½aÊø
ÎÞ*¨¸ø³oÌaʾ£¬Ö±½ÓÌøת
// JS*½*¨
location.href = url
// HTML
<meta http-equiv="Refresh" content="±iʾʱ¼aµÄÊýÖµ; url=ÒªÌøתµÄURI">
/* ¡¾Cookie¡¿ */
cookieÊÇÒ»ÖÖÔÚÔ¶³Ìa¯ÀÀÆ÷¶Ë´¢´aeÊý¾Ý²¢ÒÔ´ËÀ´¸u×ÙºÍʶ±ðÓû§µÄ»uÖÆ¡£
cookieÊÇHTTP±eÍ*µÄÒ»²¿*Ö£¬Òo´Ësetcookie()º¯Êý±ØÐeÔÚÆaËuÐÅÏ¢±»Êa³oµ½a¯ÀÀÆ÷Ç°µ÷Óã¬ÕaºÍ¶Ôheader()º¯ÊýµÄÏÞÖÆÀaËÆ¡£¿ÉÒÔʹÓÃÊa³o»º³aº¯ÊýÀ´Ñӳٽű¾µÄÊa³o£¬Ö±µ½°´ÐeÒªÉeÖúÃÁËËuÓеÄcookie»oÕßÆaËuHTTP±eÍ*¡£
// ÐÂÔo
setcookie ÐÂÔoÒ»ÌocookieÐÅÏ¢
setcookie($name [,$value [,$expire [,$path [,$domain [,$secure [,$httponly]]]]]])
#×¢Òa£ºsetcookie()º¯ÊýÇ°²»ÄÜÓÐÊa³o£¡³ý*Ç¿ªÆoob»º´ae£¡
# ²ÎÊý˵Ã÷
$name - cookieµÄʶ±ðÃu³Æ