RandomTest.php

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<?php
if( PHP_SAPI != 'cli' ) {
        die( "Run me from the command line please.\n" );
}

require_once( 'UtfNormal.php' );
require_once( '../diff/DifferenceEngine.php' );

dl('php_utfnormal.so' );

# mt_srand( 99999 );

function randomString( $length, $nullOk, $ascii = false ) {
        $out = '';
        for( $i = 0; $i < $length; $i++ )
                $out .= chr( mt_rand( $nullOk ? 0 : 1, $ascii ? 127 : 255 ) );
        return $out;
}

/* Duplicate of the cleanUp() path for ICU usage */
function donorm( $str ) {
        # We exclude a few chars that ICU would not.
        $str = preg_replace( '/[\x00-\x08\x0b\x0c\x0e-\x1f]/', UTF8_REPLACEMENT, $str );
        $str = str_replace( UTF8_FFFE, UTF8_REPLACEMENT, $str );
        $str = str_replace( UTF8_FFFF, UTF8_REPLACEMENT, $str );

        # UnicodeString constructor fails if the string ends with a head byte.
        # Add a junk char at the end, we'll strip it off
        return rtrim( utf8_normalize( $str . "\x01", UtfNormal::UNORM_NFC ), "\x01" );
}

function showDiffs( $a, $b ) {
        $ota = explode( "\n", str_replace( "\r\n", "\n", $a ) );
        $nta = explode( "\n", str_replace( "\r\n", "\n", $b ) );

        $diffs = new Diff( $ota, $nta );
        $formatter = new TableDiffFormatter();
        $funky = $formatter->format( $diffs );
        $matches = array();
        preg_match_all( '/<(?:ins|del) class="diffchange">(.*?)<\/(?:ins|del)>/', $funky, $matches );
        foreach( $matches[1] as $bit ) {
                $hex = bin2hex( $bit );
                echo "\t$hex\n";
        }
}

$size = 16;
$n = 0;
while( true ) {
        $n++;
        echo "$n\n";

        $str = randomString( $size, true);
        $clean = UtfNormal::cleanUp( $str );
        $norm = donorm( $str );

        echo strlen( $clean ) . ", " . strlen( $norm );
        if( $clean == $norm ) {
                echo " (match)\n";
        } else {
                echo " (FAIL)\n";
                echo "\traw: " . bin2hex( $str ) . "\n" .
                         "\tphp: " . bin2hex( $clean ) . "\n" .
                         "\ticu: " . bin2hex( $norm ) . "\n";
                echo "\n\tdiffs:\n";
                showDiffs( $clean, $norm );
                die();
        }


        $str = '';
        $clean = '';
        $norm = '';
}