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Sami Samhuri
b34ddbb600
- Code blocks can't be in tables or they extend past the body width. Workaround by using floated line numbers instead. - Fix typocode CSS - Change post extension from .html.md to .md. This makes URLs without extensions work with harp server again. This change works now that article titles never contain periods.
49 lines
1.8 KiB
Markdown
49 lines
1.8 KiB
Markdown
*Update: This has <a href="http://www.php.net/~derick/meeting-notes.html#method-calls">been discussed</a> for PHP6. A little late, but I guess better than never.*
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I made a mistake while I was coding, for shame! Anyway this particular mistake was that I invoked a class method on the wrong class. The funny part was that this method was an instance method in the class which I typed by mistake. In the error log I saw something like "Invalid use of $this in class function."
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I knew for a fact I hadn't used $this in a class method, so it was kind of a confusing error. I went to the file in question and found out that it was calling an instance method as a class method. Now that is some crazy shit.
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I would fully expect the PHP parser to give me an error like "No class method [foo] in class [blah]", rather than try and execute it as a class method. The syntax is completely different; you use :: to call a class method and -> to call an instance method. And you use the name of a <em>class</em> when you call a class method.
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This code:
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<pre><code>
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class Foo {
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public static function static_fun()
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{
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return "This is a class method!\n";
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}
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public function not_static()
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{
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return "This is an instance method!\n";
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}
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}
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echo '<pre>';
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echo "From Foo:\n";
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echo Foo::static_fun();
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echo Foo::not_static();
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echo "\n";
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echo "From \$foo = new Foo():\n";
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$foo = new Foo();
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echo $foo->static_fun();
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echo $foo->not_static();
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echo '</pre>';
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</code></pre>
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Produces:
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<pre><code>
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From Foo:
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This is a class method!
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This is an instance method!
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From $foo = new Foo():
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This is a class method!
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This is an instance method!
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</code></pre>
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What the fuck?! <a href="http://www.php.net/manual/en/language.oop5.static.php">http://www.php.net/manual/en/language.oop5.static.php</a> is lying to everyone.
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