Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

PHP»ù´¡Ñ§Ï°±Ê¼ÇÖ®»ù±¾Óï·¨

   php»ù´¡Ñ§Ï°ÒѾ­²î²»¶àÁË,µ«ÊÇΪ¼ìÑé×Ô¼ºµÄÑ§Ï°ÕÆÎÕÇé¿ö,°Ñphp»ù´¡ÖªÊ¶»Ø¹Ë¸´Ï°ÁËÒ»ÏÂ
µÚÒ»¸öPHP³ÌÐò
<?php
echo "Hello World!";
?>
1 ×¢ÊÍ
1.1¶àÐÐ
/*
xxxx
*/
1.2µ¥ÐÐ
//xxxxx
2. ¸³Öµ
$a = 'test';
2.1 ¼ì²é±äÁ¿ÊÇ·ñÒÑÉùÃ÷
isset($a)
2.2 ÊͷűäÁ¿
unset($a);
2.3 ¾²Ì¬±äÁ¿
static $a;
¾²Ì¬±äÁ¿¿ÉÔÚÒ»¸öº¯Êý¼¸´Îµ÷ÓÃÖб£³ÖÊýÖµ£¬¶ø²»»á±»ÏµÍ³ÊÍ·Å£¬µ«Ö»ÄÜÔÚÉùÃ÷ËüµÄº¯Êý¼¯ÖзÃÎʵ½£¬Ö»ÄÜÔÚµÚ Ò»´ÎÉùÃ÷ʱ³õʼ»¯¡£
3. »ù±¾ÀàÐÍ
3.1 Êý×ÖÀàÐÍ
3.1.1ÕûÊý£¨integer£¬¹Ø¼ü×Öint£©
.ÕûÊý¿ÉÓÃ8½øÖÆ 10½øÖÆ 16½øÖÆ ±íʾ
$a=123; //10½øÖÆ
$b=0123; //8½øÖÆ
$c=0x123; //16½øÖÆ
. ÓÉÓÚ²Ù×÷ϵͳ²»Í¬ÕûÊý¾«¶È±ä»¯ºÜ´ó£¬µ«32λÊÇ×î³£¼ûµÄ
3.1.2¸¡µã£¨float£¬¹Ø¼ü×Öfloat£¬64λ¸¡µãÊý£¬¾«¶È14룩
.PHP ÖÐfloatºÍdoubleÊǵÈͬµÄ
.ʹÓø¡µãÊýÇмǣºËûÃÇÖ»ÊǽüËÆÖµ
È磺2.5ÔÚÄÚ²¿³£±»±íʾΪ2.499999999
ÓÖÈ磺
if(0.7+0.1>=0.8){
echo 'a';
}else{
echo 'b';
}
·µ»ØÖµÎªb£¬ÕâÈ¡¾öÓÚ¸¡µãÊýµÄÈ·ÇÐʵÏÖ·½Ê½£¬ÍƼö×ö·¨ÊDZÜÃâʹÓø¡µãÖµ×ö±È ½Ï
3.2 ×Ö·û´®
.Óõ¥ÒýºÅ»òË«ÒýºÅ°üΧ
È磺echo "Hello"; echo 'Hello';
.Ë«ÒýºÅÖеıäÁ¿ »á±»½âÊÍ£¬µ¥ÒýºÅÖеÄÔò²»»á
È磺var $name = 'jano';
echo "my name is $name.";//ÏÔʾ my name is jano
echo 'my name is $name'; //ÏÔʾ my name is $name
.Ë«Òý ºÅÖеıäÁ¿¿ÉÓÃ{}°üΧÀ´Çø·Ö±äÁ¿ºÍºóÃæµÄ×Öĸ
È磺var $n = "my name is {$name}Yu";//Èç¹ûûÓÐ{}¾ÍÎÞ·¨Çø·Ö±äÁ¿ºÍ×Ö·û
.heredoc
$a = <<< HTM
skjdfjsd
lksdfjsdlf
HTML; //ºóÃæµÄ±íʾ±ØÐë¶¥ÔÚ×îÇ°Ãæ
.»ñÈ¡×Ö·û´®ÖеÄij¸ö×Ö·û
$a = 'Hello';
echo $a{1}; // ÏÔʾe
echo $a[1]; // ÏÔʾe
ÍÆ¼öʹÓõÚÒ»ÖÖд·¨¿ÉÒÔºÍÊý×éÇø·Ö¿ª
3.3 ²¼¶ûÖµ
true false
4.³£Óú¯Êý
. nl2br °É×Ö·û´®ÖеĻ»Ðзûת»¯³É<br />
È磺echo nl2br($a);
.var_dump
ÏÔʾ±ä Á¿ÀàÐͺÍÖµ£¬È磺var_dump($a);
.print_r
var_dump¼ÓÇ¿°æ£¬´òÓ¡¶ÔÏóÀàÐͺÍÄÚÈÝ£¬Êý×éÔò´ò³öËùÓÐÔªËØ£¬Àà¶ÔÏó Ôò´òÓ¡ËùÓгÉÔ±
È磺$a = array(1,2,3,4,5);
print_r($a);
5.Êý×é
Êý×éÓÃarray·½ ·¨ÉùÃ÷
Àý£º
$a = array('a','b','c');
$a = array('a','b',array(1,2,3));
.ĬÈÏ´ÓË÷Òý0¿ªÊ¼¸³Öµ
È磺$a[]='a'; //$a[0]='a';
$a[]='b'; //$a[1]='b';
.ʹÓÃ×Ö


Ïà¹ØÎĵµ£º

PHP ArrayʵÓú¯Êý²Î¿¼

array_flip
½»»»Êý×éÖеļüºÍÖµ
$arr1 = array('a'=>1,'b'=>2,'c'=>3,'d'=>4);
$array = array_flip($arr1);
showArr($array);
/*
Array
(
[1] => a
[2] => b
[3] => c
[4] => d
)
*/
array_key_exists
 
¼ì²é¸ø¶¨µÄ¼üÃû»òË÷ÒýÊÇ·ñ´æÔÚÓÚÊý×éÖÐ(Ò²¿ÉÓÃÓÚ¶ÔÏó ......

PHP¶à½ø³ÌЭ×÷±à³ÌÖ® popen

ʹÓÃpopen½áºÏSHELLÃüÁîÒ²¿ÉÒÔʵÏÖ¶à½ø³Ì²¢·¢±à³Ì¡£
ʵÀýÈçÏ£º
<?php
//b.phpÎļþ
$file = 'testdir/file.txt';
for ($i=0;$i<10;$i++){
    $fp = fopen($file,'a+');
    fputs($fp, $i.'\r\n');
    fclose($fp);
    sleep(1);
}
?> ......

php define() º¯Êý¼°defined£¨£©º¯ÊýµÄÓ÷¨


The define() function defines a constant.
define()º¯ÊýµÄ×÷ÓÃÊÇ£º¶¨ÒåÒ»¸ö³£Á¿¡£
Constants are much like variables, except for the following differences: 
³£Á¿[constant]Óë±äÁ¿[variable]ÓкܶàÏàËÆµÄµØ·½£¬Òò´Ë£¬ºÜÈÝÒ×»ìÏý£»ÏÂÃæ£¬ÎÒÃÇÁоÙһϳ£Á¿[constant]Óë±äÁ¿[variable]Ö®¼äµÄ²»Í¬µã£º
A const ......

Zend AMF+Flex+PHPµÄÒ»µãµãСÎÊÌâ

   ×òÌìÍíÉÏÒ»Ö±ÔÚ×ÁÄ¥Flex,Ïëͨ¹ýDataGrid°ÑMySQLÀïÃæµÄÊý¾Ý¸ø¶Á³öÀ´£¬ÆÚ¼ä³öÏÖÁ˼¸¸öСÎÊÌ⣬¼Ç¼ÏÂ~~
   1.µÚÒ»´Î½øÐÐÁ¬½ÓÊý¾Ý·þÎñ(Data-Connect to Data/Service-PHP-Browse)ʱ,»á³öÏÖ°²×°Zend FrameWork,Ñ¡Ôñok,²»ÒªÊºóÔÙÈ¥ÍøÕ¾ÏÂÔØZendAMF,Õâ¸öÀïÃæ»áÉÙһЩ¶«Î÷.
  2.Data-Bind to DataÊ ......

PHPºÍMySQL Web¿ª·¢ (Ô­ÊéµÚ4°æ) »úе¹¤Òµ

http://www.xhsd.com.cn/books/views.asp?plucode=711126281
Õâ±¾Êé±»³ÆÎªPHPºÍMySQLµÄ“Ê¥¾­”£¬×Ðϸ¿´ÁËһϣ¬µÄÈ·Óкܶà¶Àµ½µÄµØ·½¡£
Ê×ÏÈ£¬ÄÚÈÝÃ÷È·Í»³ö¡£Õâ±¾ÊéµÄÄ¿µÄÊǶÔPHPºÍMySQL×öÉîÈëdz³öµÄ·ÖÎö£¬¶ÔÆäWebÓ¦ÓÃ×öÁ˽ÏÈ«ÃæµÄ²ûÊö£¬Àý×Ó¾­µäʵÓá£
Æä´Î£¬Ð¡£PHP5.3£¬MySQLµÄ´æ´¢¹ý³ÌºÍ´æ´¢ÒýÇæ£¬Ajax¼¼ ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ