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<?php
namespace {
if (!function_exists('ereg')) {
function ereg($pattern, $subject, &$matches = array())
{
$boundary = _ereg_determine_boundary($pattern);
return preg_match($boundary . $pattern . $boundary, $subject, $matches);
}
function eregi($pattern, $subject, &$matches = array())
{
$boundary = _ereg_determine_boundary($pattern);
return preg_match($boundary . $pattern . $boundary . 'i', $subject, $matches);
}
function ereg_replace($pattern, $replacement, $string)
{
$boundary = _ereg_determine_boundary($pattern);
return preg_replace($boundary . $pattern . $boundary, $replacement, $string);
}
function eregi_replace($pattern, $replacement, $string)
{
$boundary = _ereg_determine_boundary($pattern);
return preg_replace($boundary . $pattern . $boundary . 'i', $replacement, $string);
}
function split($pattern, $subject, $limit = -1)
{
$boundary = _ereg_determine_boundary($pattern);
return preg_split($boundary . $pattern . $boundary, $subject, $limit);
}
function spliti($pattern, $subject, $limit = -1)
{
$boundary = _ereg_determine_boundary($pattern);
return preg_split($boundary . $pattern . $boundary . 'i', $subject, $limit);
}
/**
* @method _ereg_determine_boundary Determine a valid boundary based on the pattern.
*
* @var string $pattern The possibly escaped pattern to match for.
* @return string a suitable RegEx boundary
*
* One would suggest just using preg_quote, but perhaps the pattern already is quoted, and therefore
* using preg_quote would just double-quote and with that ruin the pattern.
* The trick here is to find a boundary that is not within the pattern.
* I have contemplated using "any ASCII charachter" but that would require detecting character classes
* and that's just too complicated.
* The chance that all of these boundaries will conflict, and if so; new ones can be added :)
*/
function _ereg_determine_boundary($pattern)
{
foreach (array('/', '@', '#', '%', '±') as $boundary) {
if (false === strpos($pattern, $boundary)) {
return $boundary;
}
}
throw new Exception("Very sorry, could not shim the regular expression. Please follow the debug trace to see where the incompatible ereg-style function call is made.");
}
}
}
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