testFifo.php

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<?php
posix_mkfifo('/tmp/test',0600);
posix_mkfifo('/tmp/test.error',0600);

$fp=fopen('/tmp/test','r');
$ep=fopen('/tmp/test.error','r');
while(true){
    if($line=fread($fp,128)){
        echo $line;
        echo "got line\n";
    }
    if($line2=fread($ep,128)){
        echo $line2;
        echo "got line2\n";
    }
    sleep(1);
}