PHP扩展 PHP5.2、PHP5.3,线程、非线程,IIS、Apache综合下载地址: http://pan.baidu.com/s/1sjrW6z7 下载相对应的php扩展文件php_mongo.dll,拷入php扩展文件夹里/php/ext,修改php.ini文件,新增下列行: extension=php_mongo.dll PHP 操作 连接数据库 $c
PHP扩展
PHP5.2、PHP5.3,线程、非线程,IIS、Apache综合下载地址:
http://pan.baidu.com/s/1sjrW6z7
下载相对应的php扩展文件php_mongo.dll,拷入php扩展文件夹里/php/ext,修改php.ini文件,新增下列行:
extension=php_mongo.dll
PHP操作
- 连接数据库
<span>$conn</span> = <span>new</span> Mongo("mongodb://localhost:27017//admin:admin");
- 选择数据库和集合
<span>//</span><span>选择数据库blog,如果没有,则创建</span> <span>$db</span> = <span>$conn</span>-><span>yyd; </span><span>//</span><span>也可以写成:$db = $conn->selectDB('yyd'); //制定结果集(集合:yyd_test)</span> <span>$collection</span> = <span>$db</span>-><span>yyd_test; </span><span>//</span><span>也可以写成:$collection = $db->selectCollection('yyd_test'); //var_dump($collection);</span>
- 新增数据
<span>$post</span> = <span>array</span>('name' => '22', 'sex' => '32'<span>); </span><span>$flag</span>=(<span>$collection</span>->insert(<span>$post</span><span>)); </span><span>var_dump</span>(<span>$flag</span>);
- 查找数据
<span>$arr</span>=<span>array</span><span>(); </span><span>$cursor</span> = <span>$collection</span>->find(<span>$arr</span><span>); </span><span>foreach</span>(<span>$cursor</span> <span>as</span> <span>$key</span> => <span>$value</span><span>){ </span><span>echo</span> "<pre class="brush:php;toolbar:false">"<span>;</span> <span>echo</span> <span>$value</span>['_id'<span>]; </span><span>echo</span> '<br>name:'<span>; </span><span>echo</span> <span>$value</span>['name'<span>]; </span><span>echo</span> "<br>sex:"<span>; </span><span>echo</span> <span>$value</span>['sex'<span>]; </span><span>echo</span> ""; }
- 条件查找
<span>$arr</span>=<span>array</span>("name"=>"22"<span>); </span><span>$cursor</span> = <span>$collection</span>->find(<span>$arr</span>);
- 修改数据
<span>$newdata</span> = <span>array</span>('$set' => <span>array</span>("email" => "test@test.com"<span>)); </span><span>$collection</span>->update(<span>array</span>("name" => "22"), <span>$newdata</span><span>); </span><span>var_dump</span>(<span>$collection</span><span>); </span><span>$arr</span>=<span>array</span>("name"=>"22"<span>); </span><span>$cursor</span> = <span>$collection</span>->find(<span>$arr</span><span>); </span><span>foreach</span>(<span>$cursor</span> <span>as</span> <span>$key</span> => <span>$value</span><span>){ </span><span>echo</span> "<pre class="brush:php;toolbar:false">"<span>;</span>
<span>echo</span> <span>$value</span>['_id'<span>]; </span><span>echo</span> '<br>name:'<span>; </span><span>echo</span> <span>$value</span>['name'<span>]; </span><span>echo</span> "<br>sex:"<span>; </span><span>echo</span> <span>$value</span>['sex'<span>]; </span><span>echo</span> "<br>email:"<span>; </span><span>echo</span> <span>$value</span>['email'<span>]; </span><span>echo</span> ""; }
- 删除数据
<span>$arr</span>=<span>array</span>("name"=>"22"<span>); </span><span>$collection</span>->remove(<span>$arr</span><span>); </span><span>var_dump</span>(<span>$collection</span>);
- 其它常用操作
<span>//</span><span>关闭连接</span> <span>$conn</span>-><span>close(); </span><span>//</span><span>删除一个数据库</span> <span>$conn</span>->dropDB("yyd"<span>); </span><span>//</span><span>列出所有可用数据库</span> <span>$dbs</span> = <span>$conn</span>->listDBs();
带有MongoDB操作函数的的PHP手册:
http://pan.baidu.com/s/1pJz2llh
或者网站:
http://www.php.net/manual/zh/class.mongodb.php
http://www.cnblogs.com/yydcdut/p/3571430.html

php把负数转为正整数的方法:1、使用abs()函数将负数转为正数,使用intval()函数对正数取整,转为正整数,语法“intval(abs($number))”;2、利用“~”位运算符将负数取反加一,语法“~$number + 1”。

实现方法:1、使用“sleep(延迟秒数)”语句,可延迟执行函数若干秒;2、使用“time_nanosleep(延迟秒数,延迟纳秒数)”语句,可延迟执行函数若干秒和纳秒;3、使用“time_sleep_until(time()+7)”语句。

php除以100保留两位小数的方法:1、利用“/”运算符进行除法运算,语法“数值 / 100”;2、使用“number_format(除法结果, 2)”或“sprintf("%.2f",除法结果)”语句进行四舍五入的处理值,并保留两位小数。

判断方法:1、使用“strtotime("年-月-日")”语句将给定的年月日转换为时间戳格式;2、用“date("z",时间戳)+1”语句计算指定时间戳是一年的第几天。date()返回的天数是从0开始计算的,因此真实天数需要在此基础上加1。

php字符串有下标。在PHP中,下标不仅可以应用于数组和对象,还可应用于字符串,利用字符串的下标和中括号“[]”可以访问指定索引位置的字符,并对该字符进行读写,语法“字符串名[下标值]”;字符串的下标值(索引值)只能是整数类型,起始值为0。

方法:1、用“str_replace(" ","其他字符",$str)”语句,可将nbsp符替换为其他字符;2、用“preg_replace("/(\s|\ \;||\xc2\xa0)/","其他字符",$str)”语句。

php判断有没有小数点的方法:1、使用“strpos(数字字符串,'.')”语法,如果返回小数点在字符串中第一次出现的位置,则有小数点;2、使用“strrpos(数字字符串,'.')”语句,如果返回小数点在字符串中最后一次出现的位置,则有。

在php中,可以使用substr()函数来读取字符串后几个字符,只需要将该函数的第二个参数设置为负值,第三个参数省略即可;语法为“substr(字符串,-n)”,表示读取从字符串结尾处向前数第n个字符开始,直到字符串结尾的全部字符。


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