How to assign string variable in php where string has both single and double quotes

Using PHP, I need to assign to a variable a long string that contains a number of single and double quotes which cause confusion when I surround the string with single or double quotes to contain it. I'm sure there must be a function to do this. However, search as I may, I cannot find one, nor contributors' solutions. These will be stored as files, not as DB records.

For example:
$string = 
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
line-height:normal;mso-outline-level:1'><b><span style='font-size:24.0pt;
font-family:"Times New Roman","serif";mso-fareast-font-family:"Times New Roman";
mso-font-kerning:18.0pt;mso-fareast-language:EN-CA'>Welcome Alpha Team!<o:p></o:p></span></b></p>

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Clearly, the example can't work with Times New Roman contained by single or double quotes.

Is there a standard method to deal with this?
Torquil BeavisBusinessAsked:
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Dave BaldwinFixer of ProblemsCommented:
You have to use 'escapes'.  The function 'addslashes' will do that except of course, it is difficult to give it a string with both quotes.  The HEREDOC construct will handle both quotes.  On , see Heredoc.

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Torquil BeavisBusinessAuthor Commented:
Thanks Dave. Perfect!
Dave BaldwinFixer of ProblemsCommented:
You're welcome, glad to help.
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