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POWriting to php://stderr
 

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    <p>I'm trying to get the use of php://stderr for writing logs to work. I'm using Slim framework which makes use of <code>@fopen('php://stderr', 'w')</code> for logging and really want this to work.</p> <p>The following test cases should work but only the first one does: </p> <pre><code>// 1. error_log - works fine error_log("Written through the error_log function", 0); // 2. PHP wrapper, ie php://stderr - does not work $stderr = fopen( 'php://stderr', 'w' ); fwrite($stderr, "Written through the PHP error stream" ); fclose($stderr); // 3. PHP wrapper also, different syntax, just to be safe - no effect either file_put_contents( "php://stderr","Hello World" ); // 4. PHP wrapper, this time using this elusive constant referred to in the manual - result: "Notice: Use of undefined constant STDERR - assumed 'STDERR' ", ie: failed also! file_put_contents( STDERR, "Hello World" ); </code></pre> <p>I've been looking through the PHP manual and Googling a lot but without much help. </p> <p>In particular, the following quote from the PHP manual <a href="http://php.net/manual/en/wrappers.php.php" rel="nofollow">on wrappers</a> is confusing:</p> <blockquote> <p>It is recommended that you simply use the constants STDIN, STDOUT and STDERR instead of manually opening streams using these [referring php://stdin, php://stdout and php://stderr] wrappers."</p> </blockquote> <p>...given the undefined constant notice above. (I suspect those constants might be for use with PHP CLI -only?- but the page I'm citing does not state it.) </p> <p>I've been wondering if this could be a Windows thing as I'm running XAMPP with PHP 5.3.8 for development but given the lack of topics on Google and the comments on PHP.net, I'm not so sure anymore. I do not have access to my production server logs right now for me to test out. </p>
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    1. USFabien Snauwaert
    1. USFabien Snauwaert
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    1. COOh thank goodness, I thought I was the only one that had the weirdly occasionally-undefined `STDERR` constant. Where have you tested your example code? What happens when you run it entirely by itself, through Apache? It should show up in the *Apache* error log, right? Does it not appear only when you're at the command prompt and/or going through that framework?
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      1. USCharles
    2. COThey are CLI only: http://php.net/manual/en/features.commandline.io-streams.php
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      1. USdev-null-dweller
    3. COWhen I run the script, case 1 shows up OK, case 4. shows up in the log because of the missing constant only (this makes sense now given those are CLI-only). However, cases 2 and 3 are nowhere to be found.
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      1. USFabien Snauwaert
 

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