Random player with automatic insertion

<?php
/*
 * Random player with automatic insertion
 * Install : append the code after the_content()
 * Description : Grabs all audio files attached to the post and prints the Audio Player
 * Dependencies : Plugin Audio Player http://wordpress.org/extend/plugins/audio-player/
 * Observations : this code will be better if converted to a function
 */
the_content();


// QUERY
$audios =& get_children( 'post_parent='.$post->ID.'&post_type=attachment&post_mime_type=audio' );

// IF HAVE ATTACHED AUDIOS AND AVAILABLE FUNCTION
if ( !empty($audios) && function_exists("insert_audio_player")) {

    // BASIC VARS
    $echou_ini = "[audio:";
    $echou_aud = "";
    $echou_tit = "|titles=";
    $echou_end = "|autostart=yes]";
    $counter = 0;
    $a = array();

    // GRAB VALUES AND MAKE TEMP ARRAY
    foreach ( $audios as $attachment_id => $attachment ) {
        $a[$counter]['url'] = wp_get_attachment_url( $attachment_id );
        $post_id_7 = get_post($attachment_id);
        $a[$counter]['tit'] = $post_id_7->post_title;
        $counter++;
    }

    // SHUFFLE TEMP ARRAY AND PREPARE AUX STRINGS
    shuffle($a);
    foreach ( $a as $audio ) {
        $echou_aud .= $audio['url']. ",";
        $echou_tit .= $audio['tit'].",";
    }

    // REMOVE EXTRA COMMA
    $echou_aud_new = substr($echou_aud, 0, -1);
    $echou_tit_new = substr($echou_tit, 0, -1);

    // MAIN STRING
    $echou_final = $echou_ini . $echou_aud_new . $echou_tit_new . $echou_end;

    // PRINT TEST STRING (REMOVE AFTER TEST)
    echo $echou_final;

    // INSERT PLAYER
    insert_audio_player( $echou_final );
}
?>