Code:
echo "<style="color:blue">hi how are u my friends?</style>";
Your not escaping the double quotes inside the double quotes. If your using double quotes and have other double quotes in side of it you need to escape it.
PHP Code:
echo "<style="color:blue">hi how are u my friends?</style>";
Should be
PHP Code:
echo "<style=\"color:blue\">hi how are u my friends?</style>";
Also I might mention you need to change the style tag to a span tag because style tags aren't used in this manner unless this is xml and you'd probably use xstl for that instead of pure css.
PHP Code:
echo "<span style=\"color:blue\">hi how are u my friends?</span>";
or you could just do this
PHP Code:
echo '<span style="color:blue">hi how are u my friends?</span>';
for more on escaping strings check this out
http://php.net/manual/en/language.types.string.php
http://www.homeandlearn.co.uk/php/php7p7.html