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POTrying to scrape images from reddit, having trouble cleaning up strings
 

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  1. POTrying to scrape images from reddit, having trouble cleaning up strings
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    <p>So I'm not asking for you to fix my script, if you know the answer I would appreciate it if you just pointed me in the right direction. This is a script I found and I'm trying to edit it for a project. </p> <p>I believe that whats going on is the formatting of $reddit is causing problems when I input that string into $url. I am not sure how to filter the string. </p> <p>Right after I posted this I had the idea of using concatenation on $reddit to get the desired result instead of filtering the string. Not sure.</p> <p>Thanks!</p> <p><strong>picgrabber.php</strong></p> <pre><code>include("RIS.php"); $reddit = "pics/top/?sort=top&amp;t=all"; $pages = 5; $t = new RIS($reddit, $pages); $t-&gt;getImagesOnPage(); $t-&gt;saveImage(); </code></pre> <p><strong>RIS.php</strong></p> <pre><code>class RIS { var $after = ""; var $reddit = ""; public function __construct($reddit, $pages) { $this-&gt;reddit = preg_replace('/[^A-Za-z0-9\-]/', '' , $reddit); if(!file_exists($this-&gt;reddit)) { mkdir($this-&gt;reddit, 0755); } $pCounter = 1; while($pCounter &lt;= $pages) { $url = "http://reddit.com/r/$reddit/.json?limit=100&amp;after=$this-&gt;after"; $this-&gt;getImagesOnPage($url); $pCounter++; } } private function getImagesOnPage($url) { $json = file_get_contents($url); $js = json_decode($json); foreach($js-&gt;data-&gt;children as $n) { if(preg_match('(jpg$|gif$|png$)', $n-&gt;data-&gt;url, $match)) { echo $n-&gt;data-&gt;url."\n"; $this-&gt;saveImage($n-&gt;data-&gt;url); } $this-&gt;after = $js-&gt;data-&gt;after; } } private function saveImage($url) { $imgName = explode("/", $url); $img = file_get_contents($url); //if the file doesnt already exist... if(!file_exists($this-&gt;reddit."/".$imgName[(count($imgName)-1)])) { file_put_contents($this-&gt;reddit."/".$imgName[(count($imgName)-1)], $img); } } } </code></pre> <p>Notice: Trying to get property of non-object in C:\Program Files (x86)\EasyPHP-DevServer-13.1VC9\data\localweb\RIS.php on line 33</p> <p>Warning: Invalid argument supplied for foreach() in C:\Program Files (x86)\EasyPHP-DevServer-13.1VC9\data\localweb\RIS.php on line 33</p> <p>Fatal error: Call to private method RIS::getImagesOnPage() from context '' in C:\Program Files (x86)\EasyPHP-DevServer-13.1VC9\data\localweb\vollyeballgrabber.php on line 23</p> <p><strong>line 33:</strong></p> <pre><code> foreach($js-&gt;data-&gt;children as $n) { var_dump($url); </code></pre> <p><strong>returns:</strong></p> <pre><code>string(78) "http://reddit.com/r/pics/top/?sort=top&amp;t=all/.json?limit=100&amp;after=" NULL </code></pre>
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    1. COWhich one is line 33 ?
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    2. COI edited it, thanks!
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    3. COCan you `var_dump()` all variables before the `foreach`; `$url`, `$json` and `$js`?
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