网友支招:PHP网站开发kohana框架里的几个写法
1、字符比较:
比较适用于比较字符是否是大小写:
程序代码
$class='Rfdsaffsadfsadfasdfsadf';
$type=($class[0]echo$type;
程序代码
echo('大写A:');
echoord('A');
echo('
');
echo('小写a:');
echoord('a');
输出是:大写A:65小写a:97
1、这样的比较应该是先转成ASCII比较的;
2、第字符是中文,用$class[0]这样的方式就取不出来了!
3、$class[0]这样的方式是不推荐使用的,我有点忘了,应该是4.0以前的写法,应该推荐用$class{0}
4、比较中文时,可以用ord(mb_substr($class,0,1,'utf-8'))>127,这里是取第字符再转成ASCII,再比较,大于127的,可能认为是中文;
2、首字母大写
和上边有点关系,也记一下;
//Makeastring'sfirstcharacteruppercase
程序代码
ucfirst()
手册里的例子是这样的:
程序代码
$foo='helloworld!';
$foo=ucfirst($foo);//Helloworld!
$bar='HELLOWORLD!';
$bar=ucfirst($bar);//HELLOWORLD!
$bar=ucfirst(strtolower($bar));//Helloworld!
?>
3、自动加载
之前一直好奇,类文件还没有require进来呢,怎么就能直接可以用了呢?
//函数似乎是5点几以后才支持的;
之前的不支持;
spl_autoload_register(array('Kohana','auto_load'));
//然后kohana里可以写成类似的:
程序代码
finalclassKohana
{
publicstaticfunctionauto_load($class)
{
require$class.'.php';
}
}
这样,你newAbc();只要Abc.php文件存在,就会直接require进来;
看一眼应该能明白是什么意思吧

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