Question

How to add <br /> only after first 100 characters? I mean just break once, not add <br /> after each 100 characters.

$str="Apple has announced that co-founder, former CEO and chairman of the board Steve Jobs has passed away at the age of 56, so we take a look back at the famous innovator's life.At left, Steve Jobs, chairman of the board of Apple Computer, leans on the new 'Macintosh' personal computer following a shareholder's meeting Jan. 24, 1984, in Cupertino, Calif. The Macintosh was priced at $2,495.";
//echo substr($str, 0, 100).'<br />'; this will break sentence after 100 characters. 
//echo wordwrap($str, 100, "\n<br />\n");this will add <br /> after each 100 characters.

And what I need is:

Apple has announced that co-founder, former CEO and chairman of the board Steve Jobs has passed away    
<br /> <-- only add here.
at the age of 56, so we take a look back at the famous innovator's life.At left, Steve Jobs, chairman of the board of Apple Computer, leans on the new 'Macintosh' personal computer following a shareholder's meeting Jan. 24, 1984, in Cupertino, Calif. The Macintosh was priced at $2,495.

Answer 1

You can use substr to get the first 100 characters and add a <br /> then and get all other chars after. Example:

<?php
    echo substr( $string , 0, 100)
         , "<br />"
         , substr( $string, 100 );
?>