str_ireplace() for php4?

[Simon]

Hi,

would anybody have a version of str_irepalce(),
(http://uk.php.net/manual/en/function.str-ireplace.php) for php4?

The doc mentions eregi_replace() and preg_repalce() but I cannot get my head
around it.

Would anybody have a few lines of code that would reproduce the
functionality above.

What I actually need to do is a search an replace of a web address.

Simon

[Janwillem Borleffs]

Re: str_ireplace() for php4?

Simon wrote:[color=blue]
> would anybody have a version of str_irepalce(),
> (http://uk.php.net/manual/en/function.str-ireplace.php) for php4?
>
> The doc mentions eregi_replace() and preg_repalce() but I cannot get
> my head around it.
>[/color]

if (!function_exis ts('str_ireplac e')) {
function str_ireplace($n eedle, $str, $haystack) {
return preg_replace("/$needle/i", $str, $haystack);
}
}


JW

[Simon]

Re: str_ireplace() for php4?

> Simon wrote:[color=blue][color=green]
>> would anybody have a version of str_irepalce(),
>> (http://uk.php.net/manual/en/function.str-ireplace.php) for php4?
>>
>> The doc mentions eregi_replace() and preg_repalce() but I cannot get
>> my head around it.
>>[/color]
>
> if (!function_exis ts('str_ireplac e')) {
> function str_ireplace($n eedle, $str, $haystack) {
> return preg_replace("/$needle/i", $str, $haystack);
> }
> }
>
>[/color]

Thanks!

Just out of curiosity, would it work if $needle, $str, $haystack had
escape/special characters?

Simon

[Janwillem Borleffs]

Re: str_ireplace() for php4?

Simon wrote:[color=blue]
> Just out of curiosity, would it work if $needle, $str, $haystack had
> escape/special characters?
>[/color]

Good point. You need to escape reserved regular expression characters in
$needle as follows:

if (!function_exis ts('str_ireplac e')) {
function str_ireplace($n eedle, $str, $haystack) {
$needle = preg_quote($nee dle, '/');
return preg_replace("/$needle/i", $str, $haystack);
}
}

$str and $haystack do not need to be modified.


JW

[Chung Leong]

Re: str_ireplace() for php4?


Simon wrote:[color=blue]
> Hi,
>
> would anybody have a version of str_irepalce(),
> (http://uk.php.net/manual/en/function.str-ireplace.php) for php4?
>
> The doc mentions eregi_replace() and preg_repalce() but I cannot get my head
> around it.
>
> Would anybody have a few lines of code that would reproduce the
> functionality above.
>
> What I actually need to do is a search an replace of a web address.
>
> Simon[/color]

Just grab the function from PEAR::PHP_Compa t
(http://pear.php.net/package/PHP_Compat/).

[Toby Inkster]

Re: str_ireplace() for php4?

Janwillem Borleffs wrote:
[color=blue]
> Simon wrote:[color=green]
>> Just out of curiosity, would it work if $needle, $str, $haystack had
>> escape/special characters?[/color]
>
> Good point. You need to escape reserved regular expression characters in
> $needle as follows:
>
> if (!function_exis ts('str_ireplac e')) {
> function str_ireplace($n eedle, $str, $haystack) {
> $needle = preg_quote($nee dle, '/');
> return preg_replace("/$needle/i", $str, $haystack);
> }
> }
>
> $str and $haystack do not need to be modified.[/color]

What if $str contained "\1"?

--
Toby A Inkster BSc (Hons) ARCS
Contact Me ~ http://tobyinkster.co.uk/contact

[Janwillem Borleffs]

Re: str_ireplace() for php4?

Toby Inkster wrote:[color=blue]
> What if $str contained "\1"?
>[/color]

You probably mean "\\1", which will contain pattern matches grouped by
parenthesis, but these will be ignored as preg_quote is used to escape the
parenthesis when occurring in $needle.


JW

[Chung Leong]

Re: str_ireplace() for php4?


Janwillem Borleffs wrote:[color=blue]
> Toby Inkster wrote:[color=green]
> > What if $str contained "\1"?
> >[/color]
>
> You probably mean "\\1", which will contain pattern matches grouped by
> parenthesis, but these will be ignored as preg_quote is used to escape the
> parenthesis when occurring in $needle.[/color]

Actually, \1 would end up being an empty string if the pattern doesn't
specify capturing.

[Simon]

Re: str_ireplace() for php4?

>>[color=blue][color=green]
>> Simon[/color]
>
> Just grab the function from PEAR::PHP_Compa t
> (http://pear.php.net/package/PHP_Compat/).
>[/color]

That's great, didn't know it existed.

Thanks for that.

Simon