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POPHP Chaining... I just can't get it!
 

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  1. POPHP Chaining... I just can't get it!
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    <p>I'm trying to create a chaining function for working with strings that are returned from an XML file.</p> <p>1 original string may have multiple replacements, some of which come from the XML file.</p> <p>Here is the ugly and standard wrapped approach:</p> <p><code>str_replace("what","is meant", str_replace("name","randomer",str_replace("blah", "hello", $string1)));</code></p> <p>Here is the approach I'm trying to replicate (like Java):</p> <p><code>$string1.replace("blah","hello").replace("name","randomer").replace("what","is meant");</code></p> <p>With the above, it works easily... until I use the XML function to get the replacing string.</p> <p>Here's my class:</p> <pre><code>class resources{ private static $instance, $string; public static function getString($stringName){ # Create new instance self::$instance = new self; # Grabs stringName from an XML file self::$string = $stringName; # Return instance var_dump(self::$instance); return self::$instance; } public static function replace($replace_this, $with_this){ # Replace and return instance self::$string = str_replace($replace_this, $with_this, self::$string); return self::$instance; } public static function show(){ # Return String return self::$string; } } echo resources::getString("alpha") // alpha -&gt;replace("lpha","bravo") // abravo -&gt;replace("vo", resources::getString("charlie")-&gt;show()) // should be abracharlie -&gt;show(); // charlie </code></pre> <p>I'd like it to understand why it's not working as I think it should and how it should actually work. It seems that when I call the class again (despite var_dump saying its a seperate instance), it replaces the original text with "charlie" so I can't just replace a part of the first bit.</p> <p>Thanks, Dominic</p> <p>EDIT: Yes!! I have figured it out (using statics) but it seems Ryano below has an even better solution</p> <pre><code>&lt;?php class resources{ private static $instance, $string, $originalString; public static function getInstance($stringName){ self::$instance = new self(); self::$originalString = $stringName; return self::$instance; } public static function getString($stringName){ # Grabs stringName from an XML file self::$string = $stringName; return self::$instance; } function replace($replace_this, $with_this){ self::$originalString = str_replace($replace_this, $with_this, self::$originalString); self::$string = self::$originalString; return self::$instance; } function show(){ return self::$string; } } echo resources::getInstance("alpha") // alpha -&gt;replace("lpha","bravo") // abravo -&gt;replace("vo", resources::getString("charlie")-&gt;show()) // should be abracharlie -&gt;replace("lie", resources::getString("vo")-&gt;show()) // abracharvo -&gt;show(); // abracharvo echo "&lt;br /&gt;"; echo resources::getInstance("randomer") // randomer -&gt;replace("er","") // random -&gt;replace("ran", resources::getString("")-&gt;show()) // dom -&gt;replace("dom", resources::getString("Dom")-&gt;show()) // Dom -&gt;show(); // Dom echo "&lt;br /&gt;"; echo resources::getInstance("nomster") // nomster -&gt;replace("nom","nmo") // nmoster -&gt;replace("nom", resources::getString("mon")-&gt;show()) // nmoster -&gt;replace("nmo", resources::getString("mon")-&gt;show()) // monster -&gt;show(); // monster ?&gt; </code></pre>
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    1. USDominic Watson
    1. USDominic Watson
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      1. POPHP Chaining... I just can't get it!
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    1. COWhy static methods?
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      1. POPHP Chaining... I just can't get it!
      1. USHamish
    2. COI assume you looked at some bad design pattern advise. Get rid of all the `static` and `self::` stuff and use `$this->` in its place. And give that class a proper name ("mystrings") if that's what it deals with.
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      1. POPHP Chaining... I just can't get it!
      1. USmario
    3. COThe static methods were an attempt to keep each object within it's own scope but it doesn't seem to work. I did originally have it like you say but that didn't work either so was trying multiple things. Resources is a bad name in its simple form but I've stripped a lot of the code to try and get the basic functionality working
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      1. POPHP Chaining... I just can't get it!
      1. USDominic Watson
 

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