<?php

// Returns true if "abc" is found anywhere in $string.

ereg("abc", $string);

// Returns true if "abc" is found at the beginning of $string.

ereg("^abc", $string);

// Returns true if "abc" is found at the end of $string.

ereg("abc$", $string);

// Returns true if client browser is Netscape 2, 3 or MSIE 3.

eregi("(ozilla.[23]|MSIE.3)", $HTTP_USER_AGENT);

// Places three space separated words into $regs[1], $regs[2] and $regs[3].

ereg("([[:alnum:]]+) ([[:alnum:]]+) ([[:alnum:]]+)", $string, $regs);

// Put a <br> tag at the beginning of $string.

$string = ereg_replace("^", "<br>", $string);

// Put a <br> tag at the end of $string.

$string = ereg_replace("$", "<br>", $string);

// Get rid of any newline characters in $string.

$string = ereg_replace("\n", "", $string);

?>