ProfilerSimpleTrace.php

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<?php
class ProfilerSimpleTrace extends ProfilerStandard {
    protected $trace = "Beginning trace: \n";
    protected $memory = 0;

    protected function collateOnly() {
        return true;
    }

    public function profileIn( $functionname ) {
        parent::profileIn( $functionname );

        $this->trace .= "         " . sprintf( "%6.1f", $this->memoryDiff() ) .
            str_repeat( " ", count( $this->mWorkStack ) ) . " > " . $functionname . "\n";
    }

    public function profileOut( $functionname ) {
        $item = end( $this->mWorkStack );

        parent::profileOut( $functionname );

        if ( !$item ) {
            $this->trace .= "Profiling error: $functionname\n";
        } else {
            list( $ofname, /* $ocount */, $ortime ) = $item;
            if ( $functionname == 'close' ) {
                $message = "Profile section ended by close(): {$ofname}";
                $functionname = $ofname;
                $this->trace .= $message . "\n";
            } elseif ( $ofname != $functionname ) {
                $this->trace .= "Profiling error: in({$ofname}), out($functionname)";
            }
            $elapsedreal = $this->getTime() - $ortime;
            $this->trace .= sprintf( "%03.6f %6.1f", $elapsedreal, $this->memoryDiff() ) .
                str_repeat( " ", count( $this->mWorkStack ) + 1 ) . " < " . $functionname . "\n";
        }
    }

    protected function memoryDiff() {
        $diff = memory_get_usage() - $this->memory;
        $this->memory = memory_get_usage();
        return $diff / 1024;
    }

    public function logData() {
        if ( $this->mTemplated ) {
            if ( PHP_SAPI === 'cli' ) {
                print "<!-- \n {$this->trace} \n -->";
            } elseif ( $this->getContentType() === 'text/html' ) {
                print "<!-- \n {$this->trace} \n -->";
            } elseif ( $this->getContentType() === 'text/javascript' ) {
                print "\n/*\n {$this->trace}\n*/";
            } elseif ( $this->getContentType() === 'text/css' ) {
                print "\n/*\n {$this->trace}\n*/";
            }
        }
    }
}