如何按字母顺序获取此文件的输出

<?php
    $termID = 5;
    $taxonomyName = \'area\';
    $termchildren = get_term_children( $termID, $taxonomyName );

    echo \'<ul>\';
    foreach ($termchildren as $child) {
        $term = get_term_by( \'id\', $child, $taxonomyName );
        echo \'<li><a href="\' . get_term_link( $term->name, $taxonomyName ) . \'">\' . $term->name . \'</a></li>\';
    }
    echo \'</ul>\';
?>