本文来自Solagirl，感谢分享。

WordPress 3.9使用TinyMCE 4.0版，钩子没怎么变，但tinymce 4.0本身有变化，所以与低于3.9的TinyMCE定制方法略有不同。本文列举几个常用的例子，文中所用代码添加到主题的Functions.php 中即可。

 

增加自定义Font Family

function customize_font_family($initArray){ 
  $initArray['font_formats'] = "Arial='Arial',Helvetica,Arial,sans-serif;Times New Roman='Times New Roman',Helvetica,Arial,sans-serif;宋体='宋体',Helvetica,Arial,sans-serif;仿宋='仿宋',Helvetica,Arial,sans-serif;仿宋GB2312='仿宋GB2312',Helvetica,Arial,sans-serif;楷体='楷体',Helvetica,Arial,sans-serif;黑体='黑体',Helvetica,Arial,sans-serif;华文新魏='华文新魏',Helvetica,Arial,sans-serif;隶书='隶书',Helvetica,Arial,sans-serif"; 
  return $initArray;
}
add_filter('tiny_mce_before_init', 'customize_font_family');

 以上代码我定义了：Arial、Times New Roman、verdana、宋体、仿宋、仿宋GB2312、楷体、黑体、华文新魏、隶书等几种字体。

 

修改字号

function customize_text_sizes($initArray){
   $initArray['fontsize_formats'] = "14px 15px 16px 17px 18px 19px 20px 21px 22px 23px 24px 25px 26px 27px 28px 29px 30px 32px 48px";
   return $initArray;
}
add_filter('tiny_mce_before_init', 'customize_text_sizes');

 

增加自定义文字颜色

function customize_text_color($initArray){
   $default_colours = '
    "000000", "Black",        "993300", "Burnt orange", "333300", "Dark olive",   "003300", "Dark green",   "003366", "Dark azure",   "000080", "Navy Blue",      "333399", "Indigo",       "333333", "Very dark gray",
    "800000", "Maroon",       "FF6600", "Orange",       "808000", "Olive",        "008000", "Green",        "008080", "Teal",         "0000FF", "Blue",           "666699", "Grayish blue", "808080", "Gray",
    "FF0000", "Red",          "FF9900", "Amber",        "99CC00", "Yellow green", "339966", "Sea green",    "33CCCC", "Turquoise",    "3366FF", "Royal blue",     "800080", "Purple",       "999999", "Medium gray",
    "FF00FF", "Magenta",      "FFCC00", "Gold",         "FFFF00", "Yellow",       "00FF00", "Lime",         "00FFFF", "Aqua",         "00CCFF", "Sky blue",       "993366", "Brown",        "C0C0C0", "Silver",
    "FF99CC", "Pink",         "FFCC99", "Peach",        "FFFF99", "Light yellow", "CCFFCC", "Pale green",   "CCFFFF", "Pale cyan",    "99CCFF", "Light sky blue", "CC99FF", "Plum",         "FFFFFF", "White"
';
$custom_colours = '
    "898989", "#898989", "666565", "#666565"
';
$initArray['textcolor_map'] = '['.$custom_colours.','.$default_colours.']'; // build colour grid default+custom colors
$initArray['textcolor_rows'] = 6; // enable 6th row for custom colours in grid
   return $initArray;
}
add_filter('tiny_mce_before_init', 'customize_text_color');

 本段代码摘自：http://stackoverflow.com/questions/23171247/add-custom-text-color-wordpress-3-9-tinymce-4-visual-editor