PHP nl2br function

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nl2br

(PHP 3, PHP 4, PHP 5)

Returns string with ‘<br />’ inserted
before all newlines.

Note:
Starting with PHP 4.0.5, nl2br() is now XHTML
compliant. All versions before 4.0.5 will return
string with ‘<br>’ inserted before
newlines instead of ‘<br />’.

Example 1. using nl2br()

echo nl2br("foo isn't\n bar");

this will output :

See also htmlspecialchars(),
htmlentities(),
wordwrap(), and
str_replace().