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Checking if email content is plain text or HTML - PHP

Working with the Code Igniter framework, I receive email using the library Peeker

. Sometimes I don't get content HTML

, just plain text

emails. For simple texts, I want to replace \r\n

with <br>

, but not for HTML content. I got below function

from SO

to check if content is HTML:

function is_html($string)
{
  return preg_match("/<[^<]+>/",$string,$m) != 0;
}

Below are some of the plain text texts I receive:

On 5/15/15, Mr.X  wrote:
> Mr. Y,
>
> Congratulations! Your book has been approved by our Editorial Board for
> Publishing. Please send me all the fonts that you have used to type
> your manuscript. Please send me the font names and the font files so that
> we can proceed.......

But the function also returns TRUE

for plain text. How to differentiate?

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1 answer


Since I know that the <div>

or tag is present <table>

, I made the following changes to the regex and it worked fine.



preg_match("/<tr [\s\S]*?<\/tr>|<table [\s\S]*?<\/table>|<div [\s\S]*?<\/div>",$string) != 0;
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