User tips: PHP Web Development Kohana framework of several writing

1, character comparison:

Comparisons apply to comparing whether a character is case-sensitive:

Program code

$class = ' RFDSAFFSADFSADFASDFSADF ';
$type = ($class [0]< ' a ')? ' Libraries ': ' Helpers ';
Echo$type;

Program code

Echo (' Uppercase A: ');
Echoord (' A ');
Echo (' Echo (' lowercase a: ');
Echoord (' a ');

Output is: Uppercase a:65 lowercase a:97

1, such comparisons should be first converted to ASCII comparison;

2, the first character is Chinese, with $class[0] this way can not be taken out!

3, $class [0] Such a way is not recommended, I have a little forget, should be 4.0 before the writing, should recommend using $class{0}

4, compared with Chinese, you can use Ord (Mb_substr ($class, 0,1, ' utf-8 ')) >127, here is to take the first character and then turn to ASCII, and then compare, greater than 127, may be considered Chinese;

2, First letter capital

Have a relationship with the above, also remember;

Makeastring ' Sfirstcharacteruppercase

Program code

Ucfirst ()

The example in the manual is this:

Program code

<?php
$foo = ' helloworld! ';
$foo =ucfirst ($foo);//helloworld!
$bar = ' helloworld! ';
$bar =ucfirst ($bar);//helloworld!
$bar =ucfirst (Strtolower ($bar));//helloworld!
?>

3, automatic loading

have been curious before, the class file has not require come in, how can directly use it?

The function appears to be supported after a few 5 points;

not supported before;

Spl_autoload_register (Array (' Kohana ', ' auto_load '));

Then the Kohana can be written like this:

Program code

Finalclasskohana

{
Publicstaticfunctionauto_load ($class)

{
Require$class. '. PHP ';
}
}
In this way, you newabc (), as long as the abc.php file exists, will be directly require in;

You should know what it means to have a look.