Warning: date() :It is not safe to rely on the system's timezone settings php 资料 w3school PHP 程序员的调试技术 vi /private/etc/php.ini.default php配置 Field 'id' doesn't have a default value 原因 数据没有设置为自增 php输出语句 PHP实现MV
Warning: date() :It is not safe to rely on the system's timezone settings
php 资料 w3school
PHP 程序员的调试技术
vi /private/etc/php.ini.default php配置
Field 'id' doesn't have a default value 原因 数据没有设置为自增
php输出语句
PHP实现MVC开发: 一个简单的MVC
Fatal error: Call to undefined function session_register() 的解决方法
vim 查找替换
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php.ini 核心配置选项说明
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一个php开发者的项目
php代码外面 添加
如:
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <!-- 不用添加分号--> <span>php </span><span>class</span> Blog <span>extends</span><span> CI_Controller { </span><span>function</span><span> __construct() { parent</span>::<span>__construct(); } </span><span>public</span> <span>function</span><span> index() { </span><span>echo</span> 'Hello World!'<span>; } </span><span>public</span> <span>function</span><span> comments() { </span><span>echo</span> '看这里!'<span>; } } </span>?>
设置微博域名地址 在右上角的账号——账号设置——个性域名。中设置自己的链接域名
文件路径替换 php字符串与字符替换函数
<span>public</span> <span>function</span><span> __construct() { </span><span>$this</span>->_dir = <span>dirname</span>(<span>__FILE__</span>) . '/files/'<span>; } </span><span>public</span> <span>function</span> cacheData(<span>$key</span>, <span>$value</span> = '', <span>$cacheTime</span> = 0<span>) { </span><span>echo</span> ("this->_dir: <span>$this</span>->_dir"<span>); </span><span>$filename</span> = <span>$this</span>->_dir . <span>$key</span> . self::<span>EXT; </span><span>echo</span> ("filename: <span>$filename</span>"<span>); </span><span>//</span><span> str_replace("iwind", "kiki", "i love iwind, iwind said"); // 将输出 "i love kiki, kiki said"</span> <span>$filename</span> = <span>str_replace</span>("\\", "/", <span>$filename</span><span>); </span><span>echo</span>("<br>"<span>); </span><span>echo</span>("after str replace filename: <span>$filename</span>"<span>); </span><span>return</span> <span>file_put_contents</span>(<span>$filename</span>,<span>$cacheTime</span> . <span>$filename</span>); <span>//</span><span>文件内容为: 0D:/wordpress/php_app/files/test1.txt</span>
在Mac下幸福快乐的用locate
如何向上下平沟通

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。

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。

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。

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。

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。

查找方法:1、用strpos(),语法“strpos("字符串值","查找子串")+1”;2、用stripos(),语法“strpos("字符串值","查找子串")+1”。因为字符串是从0开始计数的,因此两个函数获取的位置需要进行加1处理。


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