Check whether FirePHP is installed in PHP code

Question

Is there any way to determine whether FirePHP is installed on the server (via PEAR)? I'd like to make possible logging in FirePHP but also not to crash the code for everyone without that tool.

The example, how I imagine it should work:

$message = "hello";
function log($message) {
    if (library_exists('FirePHPCore/fb.php')) {
        require_once('FirePHPCore/fb.php');
        ob_start();
        \FB::log($message);
    } else {
        SomeBoringLogger::log($message);
    }
}

I haven't found anything like my library_exists method. Is there anything like that in PHP?

Answer 1

@include_once('FirePHPCore/fb.php'); // Ignore any errors here, as we check for existance
if (class_exists('FirePHP')) { // Do something after this

http://php.net/manual/en/function.class-exists.php

FirePHP uses FirePHP as its class name, so if it is available, that class should be defined

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For PHP 5.3.2 or later, use zerkms's suggestion:

(!stream_resolve_include_path('FirePHPCore/fb.php')===FALSE)