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POWhy does this PHP code overwrite file contents while opening?
 

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  1. POWhy does this PHP code overwrite file contents while opening?
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    <p>I've written some pretty complex PHP apps using this feature, so I'm not sure what's happening here.</p> <p>I'm currently writing an app that uses an online history to save content (via ajax get). The API I wrote to store the user's history to a file is extremely simple:</p> <pre><code>$myFile = "./snhistory/".$_GET["uid"]; $stringData = urldecode($_GET["name"])."\n"; $file = fopen($myFile,"a"); fwrite($file,$stringData); fclose($file); </code></pre> <p>This looks like the kind of code that adds the data found in <code>name</code> plus a new line to the end of a file, right? Well, that's not how PHP sees it. It adds one name, then when I run the code with a different name, it overwrites the first and only the second one appears. I've tried anything I could think of:</p> <pre><code> file_put_contents($myFile,file_get_contents($myFile).$stringData); </code></pre> <p>And</p> <pre><code> file_put_contents($myFile,$stringData,FILE_APPEND); </code></pre> <p>And </p> <pre><code>fopen($myFile,"w"); fseek($file,0,SEEK_END); </code></pre> <p>And all produce the same behaviour. Is it something wrong with PHP or am I missing something here? I feel like if there was a problem in the code, the second thing I tried would have fixed it. But I'm not sure, which is why I'm asking everyone here.</p> <p>I would really appreciate any help that could be provided. </p> <p><strong>Edit:</strong> As per the answer, the problem with the strings was that they contained punctuation like <code>'</code> and, for some reason, the url encoding and escaping doesn't work. Read the answer's edit for the final answer.</p>
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    1. USOsmium USA
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    1. COYou aren't passing `$file` to `fwrite` - I assume that's just an error in the question and not the actual code.
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      1. USMark Reed
    2. COI think after opening the file in append mode you need to `seek` to the end, as the file pointer will be pointing to the start (at least I have seen such behavior in other programs). Combination of the two things you tried... Can't test right now... Thus "comment" rather than answer.
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      1. USFloris
    3. COYeah. That's a mistake in the question. Let me fix that. Thank you.
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      1. USOsmium USA
 

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