ImageLoader.body.php

<?php

if ( !defined( 'MEDIAWIKI' ) ) die( 'This file is meant to be used by mediawiki.' );

class ImageLoader {
    
    private static function error( $message, $arg = false ) {
        return '<strong class="error">'
            . wfMessage( 'error-prefix' )->plain() 
            . ( !$arg ? wfMessage( $message )->plain() : wfMessage( $message, $arg )->plain() )
            . '</strong><br />';
    }
    
    public static function parserFunction( &$parser, $class = false, $arg = false ) {
        global $wgImagePrefix, $wgImageSuffix;

//      $parser->disableCache();

        if ( !$class )
            return self::error( 'no-class' );
        // first check the class, otherwise if someone uses {{#image:class{{!}}argument}},
        // they get a no-argument error instead of the invalid-image-class error, which is confusing.
        // (the class is in this case class|argument, which is obviously not what we want)
        if ( !$wgImagePrefix[$class] || !$wgImageSuffix[$class] )
            return self::error( 'invalid-class', $class );
        if ( !$arg )
            return self::error( 'no-argument' );
    
        return $parser->insertStripItem(
            '<img src="' . $wgImagePrefix[$class] . htmlspecialchars( $arg ) . $wgImageSuffix[$class] . '"></img>',
            $parser->mStripState
        );
    }

}