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I'm using PHP and the str_replace function to replace (in this case remove) some code from within an RTF file. It replaces some blocks of code in the RTF file fine, but others do not replace and I cant tell why.

I'm trying to use this function to remove paragraphs from an RTF file:

I want to remove the outer two div tags and two span tag from the below piece of html.

How do add a string inline in MathML? The type of thing I am looking for is this:

_{This was created in Microsoft Word, without using MathML}

Where the space at the start of the string (for small values of v) is preserved.

However, when I try to implement this in MathML, using for small values of v , it renders as this:

Evidently, it does not preserve spaces at the start of a string.

Is there any way around this?