43¡¢$a = ¡®abcdef¡¯; ÇëÈ¡³ö$aµÄÖµ²¢´òÓ¡³öµÚÒ»¸ö×Öĸ(1·Ö)
´ð:echo $a{0} »ò echo substr($a,0,1)
44¡¢PHP¿ÉÒÔºÍsql server/oracleµÈÊý¾Ý¿âÁ¬½ÓÂð (1·Ö)
´ð:µ±È»¿ÉÒÔ
45¡¢Çëд³öPHP5ȨÏÞ¿ØÖÆÐÞÊηû(3·Ö)
´ð:public(¹«¹²),private(˽ÓÃ),protected(¼Ì³Ð)
46¡¢Çëд³öphp5µÄ¹¹Ô캯ÊýºÍÎö¹¹º¯Êý(2·Ö)
´ð:__construct , __destruct
47¡¢Íê³ÉÒÔÏÂ:
(Ò»)´´½¨ÐÂÎÅ·¢²¼ÏµÍ³£¬±íÃûΪmessageÓÐÈçÏÂ×ֶΠ(3·Ö)
id ÎÄÕÂid
title ÎÄÕ±êÌâ
content ÎÄÕÂÄÚÈÝ
category_id ÎÄÕ·ÖÀàid
hits µã»÷Á¿
´ð:CREATE TABLE ¡®message¡¯(
¡®id¡¯ int(10) NOT NULL auto_increment,
¡®title¡¯ varchar(200) default NULL,
¡®content¡¯ text,
¡®category_id¡¯ int(10) NOT NULL,
¡®hits¡¯ int(20),
PRIMARY KEY(¡®id¡¯);
)ENGINE=InnoDB DEFAULT CHARSET=utf8;
(¶þ)ͬÑùÉÏÊöÐÂÎÅ·¢²¼ÏµÍ³£º±ícomment¼Ç¼Óû§»Ø¸´ÄÚÈÝ£¬×Ö¶ÎÈçÏ (4·Ö)
comment_id »Ø¸´id
id ÎÄÕÂid£¬¹ØÁªmessage±íÖеÄid
comment_content »Ø¸´ÄÚÈÝ
ÏÖͨ¹ý²éѯÊý¾Ý¿âÐèÒªµÃµ½ÒÔϸñʽµÄÎÄÕ±êÌâÁбí,²¢°´Õջظ´ÊýÁ¿ÅÅÐò£¬»Ø¸´×î¸ßµÄÅÅÔÚ×îÇ°Ãæ
ÎÄÕÂid ÎÄÕ±êÌâ µã»÷Á¿ »Ø¸´ÊýÁ¿
ÓÃÒ»¸öSQLÓï¾äÍê³ÉÉÏÊö²éѯ£¬Èç¹ûÎÄÕÂûÓлظ´Ôò»Ø¸´ÊýÁ¿ÏÔʾΪ0
´ð:SELECT message.id id,message.title title,IF(message.`hits` IS NULL,0,message.`hits`) hits,
IF(comment.`id` is NULL,0,count(*)) number FROM message LEFT JOIN
comment ON message.id=comment.id GROUP BY message.`id`;
(Èý)ÉÏÊöÄÚÈݹÜÀíϵͳ£¬±ícategory±£´æ·ÖÀàÐÅÏ¢£¬×Ö¶ÎÈçÏ (3·Ö)
category_id int(4) not null auto_increment;
categroy_name varchar(40) not null;
Óû§ÊäÈëÎÄÕÂʱ£¬Í¨¹ýÑ¡ÔñÏÂÀ²Ëµ¥Ñ¡¶¨ÎÄÕ·ÖÀà
д³öÈçºÎʵÏÖÕâ¸öÏÂÀ²Ëµ¥
´ð:function categoryList()
{
$result=mysql_query(¡°select category_id,categroy_name from category¡±)
or die(¡°Invalid query: ¡± . mysql_error());
print(¡°\n¡±);
while($rowArray=mysql_fetch_array($result))
{
print(¡°¡±.$rowArray['categroy_name'].¡± \n¡±);
}
print(¡°¡±);
}
±à³ÌÌâ:
1. дһ¸öº¯Êý£¬¾¡¿ÉÄܸßЧµÄ£¬´ÓÒ»¸ö±ê×¼ url ÀïÈ¡³öÎļþµÄÀ©Õ¹Ãû
ÀýÈç: http://www.sina.com.cn/abc/de/fg.php id=1 ÐèҪȡ³ö php »ò .php
´ð°¸1:
function getExt($url){
$arr = parse_url($url);
$file = basename($arr['path']);
$ext = explode(¡°.¡±,$file);
return $ext[1];
}
´ð°¸2:
function getExt($url) {
$url = basename($url);
$pos1 = strpos($url,¡±.¡±);
$pos2 = strpos($url,¡± ¡±);
if(strstr($url,¡± ¡±)){
return substr($url,$pos1 + 1,$pos2 ¨C $pos1 ¨C 1);
} else {
return substr($url,$pos1);
}
}
2. ÔÚ HTML ÓïÑÔÖУ¬Ò³ÃæÍ·²¿µÄ meta ±ê¼Ç¿ÉÒÔÓÃÀ´Êä³öÎļþµÄ±àÂë¸ñʽ£¬ÒÔÏÂÊÇÒ»¸ö±ê×¼µÄ meta Óï¾ä
ÇëʹÓà PHP ÓïÑÔдһ¸öº¯Êý£¬°ÑÒ»¸ö±ê×¼ HTML Ò³ÃæÖеÄÀàËÆ meta ±ê¼ÇÖÐµÄ charset ²¿·ÖÖµ¸ÄΪ big5
Çë×¢Òâ:
1. ÐèÒª´¦ÀíÍêÕûµÄ html Ò³Ã棬¼´²»¹â´Ë meta Óï¾ä
2. ºöÂÔ´óСд
3. ¡® ºÍ ¡± ÔÚ´Ë´¦ÊÇ¿ÉÒÔ»¥»»µÄ
4. ¡®Content-Type¡¯ Á½²àµÄÒýºÅÊÇ¿ÉÒÔºöÂԵģ¬µ« ¡®text/html; charset=gbk¡¯ Á½²àµÄ²»ÐÐ
5. ×¢Òâ´¦Àí¶àÓà¿Õ¸ñ
3. дһ¸öº¯Êý£¬Ëã³öÁ½¸öÎļþµÄÏà¶Ô·¾¶
Èç $a = ¡®/a/b/c/d/e.php¡¯;
$b = ¡®/a/b/12/34/c.php¡¯;
¼ÆËã³ö $b Ïà¶ÔÓÚ $a µÄÏà¶Ô·¾¶Ó¦¸ÃÊÇ ../../c/d½«()ÌíÉÏ
´ð:function getRelativePath($a, $b) {
$returnPath = array(dirname($b));
$arrA = explode(¡®/¡¯, $a);
$arrB = explode(¡®/¡¯, $returnPath[0]);
for ($n = 1, $len = count($arrB); $n < $len; $n++) {
if ($arrA[$n] != $arrB[$n]) {
break;
}
}
if ($len ¨C $n > 0) {
$returnPath = array_merge($returnPath, array_fill(1, $len ¨C $n, ¡®..¡¯));
}
$returnPath = array_merge($returnPath, array_slice($arrA, $n));
return implode(¡®/¡¯, $returnPath);
}
echo getRelativePath($a, $b);
Ìî¿ÕÌâ:
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ÖÐ
2.Ö´ÐгÌÐò¶Î< php echo 8%(-2) >½«Êä³ö__0__¡£
3.ÔÚHTTP 1.0ÖУ¬×´Ì¬Âë 401 µÄº¬ÒåÊÇ____;Èç¹û·µ»Ø¡°ÕÒ²»µ½Îļþ¡±µÄÌáʾ£¬Ôò¿ÉÓà header º¯Êý£¬ÆäÓï¾äΪ____¡£
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7.ÒÔApacheÄ£¿éµÄ·½Ê½°²×°PHP£¬ÔÚÎļþhttp.confÖÐÊ×ÏÈÒªÓÃÓï¾ä____¶¯Ì¬×°ÔØPHPÄ£¿é£¬È»ºóÔÙÓÃÓï¾ä____ʹµÃApache°ÑËùÓÐÀ©Õ¹ÃûΪphpµÄÎļþ¶¼×÷ΪPHP½Å±¾´¦Àí¡£
LoadModule php5_module ¡°c:/php/php5apache2.dll¡± , AddType application/x-httpd-php .php,
8.Óï¾ä include ºÍ require ¶¼ÄÜ°ÑÁíÍâÒ»¸öÎļþ°üº¬µ½µ±Ç°ÎļþÖУ¬ËüÃǵÄÇø±ðÊÇ____;ΪÁ˱ÜÃâ¶à´Î°üº¬Í¬Ò»Îļþ£¬¿ÉÒÔÓÃÓï¾ä__require_once||include_once__À´´úÌæËüÃÇ¡£
9.ÀàµÄÊôÐÔ¿ÉÒÔÐòÁл¯ºó±£´æµ½ session ÖУ¬´Ó¶øÒÔºó¿ÉÒÔ»Ö¸´Õû¸öÀ࣬ÕâÒªÓõ½µÄº¯ÊýÊÇ____¡£
10.Ò»¸öº¯ÊýµÄ²ÎÊý²»ÄÜÊǶԱäÁ¿µÄÒýÓ㬳ý·ÇÔÚphp.iniÖаÑ__allow_call_time_pass_reference boolean__ÉèΪon.
11.SQLÖÐLEFT JOINµÄº¬ÒåÊÇ__×ÔÈ»×óÍâÁ´½Ó__¡£Èç¹û tbl_user¼Ç¼ÁËѧÉúµÄÐÕÃû(name)ºÍѧºÅ(ID)£¬tbl_score¼Ç¼ÁËѧÉú(ÓеÄѧÉú¿¼ÊÔÒԺ󱻿ª³ýÁË£¬Ã»ÓÐÆä¼Ç¼)µÄѧºÅ(ID)
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12.ÔÚPHPÖУ¬heredocÊÇÒ»ÖÖÌØÊâµÄ×Ö·û´®£¬ËüµÄ½áÊø±êÖ¾±ØÐë____¡£
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13.дһ¸öº¯Êý£¬Äܹ»±éÀúÒ»¸öÎļþ¼ÐϵÄËùÓÐÎļþºÍ×ÓÎļþ¼Ð¡£
´ð:
function my_scandir($dir)
{
$files = array();
if ( $handle = opendir($dir) ) {
while ( ($file = readdir($handle)) !== false ) {
if ( $file != ¡°..¡± && $file != ¡°.¡± ) {
if ( is_dir($dir . ¡°/¡± . $file) ) {
$files[$file] = scandir($dir . ¡°/¡± . $file);
}else {
$files[] = $file;
}
}
}
closedir($handle);
return $files;
}
}
14.¼òÊöÂÛ̳ÖÐÎÞÏÞ·ÖÀàµÄʵÏÖÔÀí¡£
´ð:
< php
/*
Êý¾Ý±í½á¹¹ÈçÏÂ:
CREATE TABLE `category` (
`categoryID` smallint(5) unsigned NOT NULL auto_increment,
`categoryParentID` smallint(5) unsigned NOT NULL default ¡¯0¡ä,
`categoryName` varchar(50) NOT NULL default ¡±,
PRIMARY KEY (`categoryID`)
) ENGINE=MyISAM DEFAULT CHARSET=gbk;
INSERT INTO `category` ( `categoryParentID`, `categoryName`) VALUES
(0, ¡®Ò»¼¶Àà±ð¡¯),
(1, ¡®¶þ¼¶Àà±ð¡¯),
(1, ¡®¶þ¼¶Àà±ð¡¯),
(1, ¡®¶þ¼¶Àà±ð¡¯),
(2, ¡®Èý¼¶Àà±ð¡¯),
(2, ¡¯333332¡ä),
(2, ¡¯234234¡ä),
(3, ¡®aqqqqqd¡¯),
(4, ¡®¹þ¹þ¡¯),
(5, ¡¯66333666¡ä);
*/
//Ö¸¶¨·ÖÀàid±äÁ¿$category_id,È»ºó·µ»Ø¸Ã·ÖÀàµÄËùÓÐ×ÓÀà
//$default_categoryΪĬÈϵÄÑ¡ÖеķÖÀà
function Get_Category($category_id = 0,$level = 0, $default_category = 0)
{
global $DB;
$sql = ¡°SELECT * FROM category ORDER BY categoryID DESC¡±;
$result = $DB->query( $sql );
while ($rows = $DB->fetch_array($result))
{
$category_array[$rows[categoryParentID]][$rows[categoryID]] = array(¡®id¡¯ => $rows[categoryID], ¡®parent¡¯ => $rows[categoryParentID], ¡®name¡¯ => $rows
[categoryName]);
}
if (!isset($category_array[$category_id]))
{
return ¡°¡±;
}
foreach($category_array[$category_id] AS $key => $category)
{
if ($category['id'] == $default_category)
{
echo ¡°}else
{
echo ¡°}
if ($level > 0)
{
echo ¡°>¡± . str_repeat( ¡± ¡°, $level ) . ¡± ¡± . $category['name'] . ¡°
\n¡±;
}
else
{
echo ¡°>¡± . $category['name'] . ¡°
\n¡±;
}
Get_Category($key, $level + 1, $default_category);
}
unset($category_array[$category_id]);
}
/*
º¯Êý·µ»ØµÄÊý×é¸ñʽÈçÏÂËùʾ:
Array
(
[1] => Array ( [id] => 1 [name] => Ò»¼¶Àà±ð [level] => 0 [ParentID] => 0 )
[4] => Array ( [id] => 4 [name] => ¶þ¼¶Àà±ð [level] => 1 [ParentID] => 1 )
[9] => Array ( [id] => 9 [name] => ¹þ¹þ [level] => 2 [ParentID] => 4 )
[3] => Array ( [id] => 3 [name] => ¶þ¼¶Àà±ð [level] => 1 [ParentID] => 1 )
[8] => Array ( [id] => 8 [name] => aqqqqqd [level] => 2 [ParentID] => 3 )
[2] => Array ( [id] => 2 [name] => ¶þ¼¶Àà±ð [level] => 1 [ParentID] => 1 )
[7] => Array ( [id] => 7 [name] => 234234 [level] => 2 [ParentID] => 2 )
[6] => Array ( [id] => 6 [name] => 333332 [level] => 2 [ParentID] => 2 )
[5] => Array ( [id] => 5 [name] => Èý¼¶Àà±ð [level] => 2 [ParentID] => 2 )
[10] => Array ( [id] => 10 [name] => 66333666 [level] => 3 [ParentID] => 5 )
)
*/
//Ö¸¶¨·ÖÀàid,È»ºó·µ»ØÊý×é
function Category_array($category_id = 0,$level=0)
{
global $DB;
$sql = ¡°SELECT * FROM category ORDER BY categoryID DESC¡±;
$result = $DB->query($sql);
while ($rows = $DB->fetch_array($result))
{
$category_array[$rows['categoryParentID']][$rows['categoryID']] = $rows;
}
foreach ($category_array AS $key=>$val)
{
if ($key == $category_id)
{
foreach ($val AS $k=> $v)
{
$options[$k] =
array(
¡®id¡¯ => $v['categoryID'], ¡®name¡¯ => $v['categoryName'], ¡®level¡¯ => $level, ¡®ParentID¡¯=>$v['categoryParentID']
);
$children = Category_array($k, $level+1);
if (count($children) > 0)
{
$options = $options + $children;
}
}
}
}
unset($category_array[$category_id]);
return $options;
}
>
< php
class cate
{
function Get_Category($category_id = 0,$level = 0, $default_category = 0)
{
echo $category_id;
$arr = array(
¡¯0¡ä => array(
¡¯1¡ä => array(¡®id¡¯ => 1, ¡®parent¡¯ => 0, ¡®name¡¯ => ¡¯1111¡ä),
¡¯2¡ä => array(¡®id¡¯ => 2, ¡®parent¡¯ => 0, ¡®name¡¯ => ¡¯2222¡ä),
¡¯4¡ä => array(¡®id¡¯ => 4, ¡®parent¡¯ => 0, ¡®name¡¯ => ¡¯4444¡ä)
),
¡¯1¡ä => array(
¡¯3¡ä => array(¡®id¡¯ => 3, ¡®parent¡¯ => 1, ¡®name¡¯ => ¡¯333333¡ä),
¡¯5¡ä => array(¡®id¡¯ => 5, ¡®parent¡¯ => 1, ¡®name¡¯ => ¡¯555555¡ä)
),
¡¯3¡ä => array(
¡¯6¡ä => array(¡®id¡¯ => 6, ¡®parent¡¯ => 3, ¡®name¡¯ => ¡¯66666¡ä),
¡¯7¡ä => array(¡®id¡¯ => 7, ¡®parent¡¯ => 3, ¡®name¡¯ => ¡¯77777¡ä)
),
¡¯4¡ä => array(
¡¯8¡ä => array(¡®id¡¯ => 8, ¡®parent¡¯ => 4, ¡®name¡¯ => ¡¯8888¡ä),
¡¯9¡ä => array(¡®id¡¯ => 9, ¡®parent¡¯ => 4, ¡®name¡¯ => ¡¯9999¡ä)
)
);
if (!isset($arr[$category_id]))
{
return ¡°¡±;
}
foreach($arr[$category_id] AS $key => $cate)
{
if ($cate['id'] == $default_category)
{
$txt = ¡°}else{
$txt = ¡°}
if ($level > 0)
{
$txt1 = ¡°>¡± . str_repeat( ¡°-¡±, $level ) . ¡± ¡± . $cate['name'] . ¡°
\n¡±;
}else{
$txt1 = ¡°>¡± . $cate['name'] . ¡°
\n¡±;
}
$val = $txt.$txt1;
echo $val;
self::Get_Category($key, $level + 1, $default_category);
}
}
function getFlush($category_id = 0,$level = 0, $default_category = 0)
{
ob_start();
self::Get_Category($category_id ,$level, $default_category);
$out = ob_get_contents();
ob_end_clean();
return $out;
}
}
$id =$_GET['id'];
echo ¡°¡±;
$c = new cate();
//$c->Get_Category();
$ttt= $c->getFlush($id,¡¯0¡ä,¡¯3¡ä);
echo $ttt;
echo ¡°¡±;
>
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