从PHPExcel读取获取文本而不是RTF/对象

我正在做一个项目，我使用PHPExcel库做一些事情。我今天遇到了第一个问题。从Excel中读写工作得很好，但后来我要开始从Excel表格中取出一些东西，然后在Mongo中输入一些东西。我从Excel中读取数组，然后通过$collection->insert($array);

我得到一个异常，告诉我它不能插入任何带有零字符键的东西。我对我的数组做了一个var_dum()，看看它在世界上的什么地方得到了一个空键，这就是转储产生的结果。

array(10) 
{ 
    ["um"]=> string(2) "EA" 
    ["desc"]=> string(37) "FRAME WELDMENT, NITRATE REMOVAL TANKS" 
    ["vws_num"]=> NULL 
    ["part_num"]=> string(10) "SD-0408-01" 
    ["manufac"]=> object(PHPExcel_RichText)#665 (1) 
    { 
        ["_richTextElements" : "PHPExcel_RichText" : private]=> array(3) 
        { 
            [0]=> object(PHPExcel_RichText_TextElement)#184 (1) 
            { 
                ["_text":"PHPExcel_RichText_TextElement":private]=> string(23) "VEOLIA WATER SOLUTIONS " 
            } 
            [1]=> object(PHPExcel_RichText_Run)#179 (2) 
            { 
                ["_font":"PHPExcel_RichText_Run":private]=> object(PHPExcel_Style_Font)#183 (12) 
                { 
                    ["_name":"PHPExcel_Style_Font":private]=> string(5) "SWGDT" 
                    ["_size":"PHPExcel_Style_Font":private]=> string(2) "10" 
                    ["_bold":"PHPExcel_Style_Font":private]=> bool(false) 
                    ["_italic":"PHPExcel_Style_Font":private]=> bool(false) 
                    ["_superScript":"PHPExcel_Style_Font":private]=> bool(false) 
                    ["_subScript":"PHPExcel_Style_Font":private]=> bool(false) 
                    ["_underline":"PHPExcel_Style_Font":private]=> string(4) "none" 
                    ["_strikethrough":"PHPExcel_Style_Font":private]=> bool(false) 
                    ["_color":"PHPExcel_Style_Font":private]=> object(PHPExcel_Style_Color)#186 (4) 
                    { 
                        ["_argb":"PHPExcel_Style_Color":private]=> string(8) "FF000000" 
                        ["_isSupervisor":"PHPExcel_Style_Color":private]=> bool(false) 
                        ["_parent":"PHPExcel_Style_Color":private]=> NULL 
                        ["_parentPropertyName":"PHPExcel_Style_Color":private]=> NULL 
                    } 
                    ["_parentPropertyName":"PHPExcel_Style_Font":private]=> NULL 
                    ["_isSupervisor":"PHPExcel_Style_Font":private]=> bool(false) 
                    ["_parent":"PHPExcel_Style_Font":private]=> NULL 
                } 
                ["_text":"PHPExcel_RichText_TextElement":private]=> string(1) " " 
            } 
            [2]=> object(PHPExcel_RichText_Run)#182 (2) 
            { 
                ["_font":"PHPExcel_RichText_Run":private]=> object(PHPExcel_Style_Font)#189 (12) 
                { 
                    ["_name":"PHPExcel_Style_Font":private]=> string(14) "Century Gothic" 
                    ["_size":"PHPExcel_Style_Font":private]=> string(2) "10" 
                    ["_bold":"PHPExcel_Style_Font":private]=> bool(false) 
                    ["_italic":"PHPExcel_Style_Font":private]=> bool(false) 
                    ["_superScript":"PHPExcel_Style_Font":private]=> bool(false) 
                    ["_subScript":"PHPExcel_Style_Font":private]=> bool(false) 
                    ["_underline":"PHPExcel_Style_Font":private]=> string(4) "none" 
                    ["_strikethrough":"PHPExcel_Style_Font":private]=> bool(false) 
                    ["_color":"PHPExcel_Style_Font":private]=> object(PHPExcel_Style_Color)#188 (4) 
                    { 
                        ["_argb":"PHPExcel_Style_Color":private]=> string(8) "FF000000" 
                        ["_isSupervisor":"PHPExcel_Style_Color":private]=> bool(false) 
                        ["_parent":"PHPExcel_Style_Color":private]=> NULL 
                        ["_parentPropertyName":"PHPExcel_Style_Color":private]=> NULL 
                    } 
                    ["_parentPropertyName":"PHPExcel_Style_Font":private]=> NULL 
                    ["_isSupervisor":"PHPExcel_Style_Font":private]=> bool(false) 
                    ["_parent":"PHPExcel_Style_Font":private]=> NULL 
                } 
                ["_text":"PHPExcel_RichText_TextElement":private]=> string(14) "& TECHNOLOGIES" 
            } 
        } 
    } 
    ["vendor"]=> NULL 
    ["unit_price"]=> NULL 
    ["list_price"]=> NULL 
    ["multiplier"]=> NULL 
    ["times_req"]=> float(1) 
}

为什么我的"manufac"键持有一个疯狂的疯狂的PHPExcel对象?我正在检索每个单元格的内容

$array[$rowIndex][$col] = $cell->getCalculatedValue();

我知道Excel工作表的特定单元格中有一个新的行字符，是吗?或者这是在告诉我在那个单元格上放置了某种奇怪的格式?

我只是想从这个单元格的文本值，像所有其他的已经给了我…

提前感谢您的帮助!