273 lines
13 KiB
HTML
273 lines
13 KiB
HTML
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<h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">PHP Basics</a></h1>
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<a href="guides/overview/traits.html#traits" class="">Traits</a>
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<a href="packages/Basics-DataStructures.html" class="">DataStructures</a>
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<a href="packages/Basics-ErrorHandlers.html" class="">ErrorHandlers</a>
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<a href="packages/Basics-Interfaces.html" class="">Interfaces</a>
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<a href="packages/Basics-Traits.html" class="">Traits</a>
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<div class="phpdocumentor-column -nine phpdocumentor-content">
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<div class="section" id="traits">
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<h1>Traits</h1>
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<div class="admonition-wrapper">
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<div class="admonition admonition-sidebar"><p class="sidebar-title">Table of Contents</p>
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<div class="contents"><ul class="phpdocumentor-list"><li class="toc-item"><a href="guides/overview/traits.html#getter">Getter</a></li><li class="toc-item"><a href="guides/overview/traits.html#overloadinggetter">OverloadingGetter</a></li><li class="toc-item"><a href="guides/overview/traits.html#overloadingsetter">OverloadingSetter</a></li><li class="toc-item"><a href="guides/overview/traits.html#setter">Setter</a></li><li class="toc-item"><a href="guides/overview/traits.html#singleton">Singleton</a></li><li class="toc-item"><a href="guides/overview/traits.html#typechecker">TypeChecker</a></li></ul></div>
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</div>
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</div>
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<div class="section" id="getter">
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<h2>Getter</h2>
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<p>Reads data from inaccessible properties by using magic methods.</p>
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<p>To make a <code>protected</code> or <code>private</code> property readable, provide a method named
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<code>_magicGet{Property}()</code> which handles the reading. Replace <code>{Property}</code> in
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the method's name with the name of the actual property (with an uppercase
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first letter).</p>
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<p>> Example: If the property is named <code>$fooBar</code>, the "magic" method has to be
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> <code>_magicGetFooBar()</code>. This method is then called when <code>$fooBar</code> is read in
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> a context where it normally would not be accessible.</p>
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</div>
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<div class="section" id="overloadinggetter">
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<h2>OverloadingGetter</h2>
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<p>Overloads a class with readable magic properties.</p>
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<p>Internally it reads the protected <code>$_data</code> array whose keys are interpreted
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as property names.</p>
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<p>> Example: Reading <code>Foo->bar</code> will return the value of <code>$_data['bar']</code>.</p>
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</div>
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<div class="section" id="overloadingsetter">
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<h2>OverloadingSetter</h2>
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<p>Overloads a class with writable magic properties.</p>
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<p>Internally it writes the protected <code>$_data</code> array whose keys are interpreted
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as property names.</p>
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<p>> Example: <code>Foo->bar = 42;</code> will set <code>$_data['bar']</code> to <code>42</code>.</p>
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</div>
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<div class="section" id="setter">
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<h2>Setter</h2>
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<p>Writes data to inaccessible properties by using magic methods.</p>
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<p>To make a <code>protected</code> or <code>private</code> property writable, provide a method named
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<code>_magicSet{Property}()</code> which handles the writing. Replace <code>{Property}</code> in
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the method's name with the name of the actual property (with an uppercase
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first letter).</p>
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<p>> Example: If the property is named <code>$fooBar</code>, the "magic" method has to be
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> <code>_magicSetFooBar()</code>. This method is then called when <code>$fooBar</code> is written
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> to in a context where it normally would not be accessible.</p>
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</div>
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<div class="section" id="singleton">
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<h2>Singleton</h2>
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<p>Allows just a single instance of the class using this trait.</p>
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<p>Get the singleton by calling the static method <code>getInstance()</code>.</p>
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<p>If there is no object yet, the constructor is called with the same arguments
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as <code>getInstance()</code>. Any later call will just return the already instantiated
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object (irrespective of the given arguments).</p>
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<p>In order for this to work as expected, the constructor has to be implemented
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as <code>private</code> to prevent direct instantiation of the class.</p>
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</div>
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<div class="section" id="typechecker">
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<h2>TypeChecker</h2>
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<p>A generic data type checker.</p>
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<p>This allows to set a list of allowed atomic data types and fully qualified
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class names. It also provides a method to check if a value's data type matches
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at least one of these types.</p>
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