import excel file with subscript character

Question

Uploading Excel file is ok and not an issue

gone through many articles on uloading excel to mysql Tried

http://phpexcel.codeplex.com/

http://sourceforge.net/projects/phpexcelreader/

https://stackoverflow.com/a/7889220/1026905 (really nice encoding class)

MY issue is i cannot upload the chracter seen in excel file as it is

superscript part is getting converted Example in

∴ tn = n² + 2n + 1 + 2

n² ... gets converted as it is
∴ .... get converted as it is

all characters like ∠Ωπ √ ∞ ≅⊥∫∪∴≈≡⊆μ I could get converted as it is

Only issue is tn, t1, t2, t3 i am unable to get n,1,2,3 as subscript (cannot be displayed here but you can view in the image

 tn ... should be t<sub>n</sub>

... in html format n should be subscript 

I am not getting this as it is

Answer 1

Using PHPExcel, you can identify if a cell contains rich text because a getValue() call will return a PHPExcel_RichText object rather than a string/integer/float/boolean scalar type.

You can then loop through the collection of PHPExcel_RichText_Run objects for that PHPExcel_RichText object looking at the style associated with it:

$cellValueAsString = '';
$elements = $cell->getValue()->getRichTextElements();
foreach ($elements as $element) {
    // Rich text start?
    if ($element instanceof PHPExcel_RichText_Run) {
        if ($element->getFont()->getSuperScript()) {
            $cellValueAsString .= '<sup>';
        } else if ($element->getFont()->getSubScript()) {
            $cellValueAsString .= '<sub>';
        }
    }
    // Convert UTF8 data to PCDATA
    $cellText = $element->getText();
    $cellValueAsString .= htmlspecialchars($cellText);
    if ($element instanceof PHPExcel_RichText_Run) {
        if ($element->getFont()->getSuperScript()) {
            $cellValueAsString .= '</sup>';
        } else if ($element->getFont()->getSubScript()) {
            $cellValueAsString .= '</sub>';
        }
    }
}

would be a simple block of code to turn the rich text cell content into simple HTML markup showing superscripted and subscripted characters