ereg and Multiple Ocurrences

[Anon]

I'm using ereg and eregi to pick out pieces of custom code and replace them with their proper HTML counterparts using ereg_replace and eregi_replace. I just realized that ereg will only pick out the first occurence of a match. I need it to be able to pick out multiple occurences of a custom tag (with different contents).

I have seen an example in the PHP manual on how to do this, but have no clue how it works! Any help in how I can do this, or by explaining the lone example in the PHP manual on how to do this would be very much appreciated!

Also, I was informed that I should use preg_match instead. Could anyone give me a starting point on where I should look to learn how to use that?

Thanks.

[Anon]

If you could give us an example of what you want converted and what the final output will be, it would help a ton... I'm not really sure what you are asking...

As for using preg_match instead, preg is MUCH faster then ereg functions.

[Anon]

Hi, thanks for the reply. This is the code that I have currently:

if (eregi("[img=\"([-./a-zA-Z0-9!&%#?,'=:~])\"( align=\"([a-zA-Z0-9])\")?( alt=\"([-./a-zA-Z0-9!&%#?,'=:~$ ()])\")?( border=\"([0-9])\")?( link=\"([-./a-zA-Z0-9!&%#?,'=:~])\")?]",$output_document,$image_data)) {
print_r($image_data);
$image_url = $image_data[1];
$image_align = $image_data[3];
$image_alt = $image_data[5];
$image_border = $image_data[7];
$image_link = $image_data[9];
$image_alt = eregi_replace("\'\'","\"",$image_alt);
if (!eregi("^./",$image_url) || !eregi("^{http://",$image_url))} {
$image_url = $siteroot."images/docs/$doc_id/$image_url";
}
if (eregi("center",$image_align)) {
$image .= "<center>";
}
if (isset($image_data[8])) {
if (!eregi("^./",$image_link) || !eregi("^{http://",$image_link))} {
$image_link = $siteroot."images/docs/$doc_id/$image_link";
}
$image .= "<a href=\"$image_link\">";
}
$image .= "<img src=\"$image_url\"";
if (isset($image_data[2])) {
$image .= " align=\"$image_align\"";
if (eregi("left",$image_align) || eregi("right",$image_align)) {
$image .= " vspace=\"$image_vspace\" hspace=\"$image_hspace\"";
}
}
if (isset($image_data[4])) {
$image .= " alt=\"$image_alt\"";
}
if (isset($image_data[6])) {
$image .= " border=\"$image_border\"";
} else {
$image .= " border=\"0\"";
}
$image .= ">";
if (isset($image_data[8])) {
$image .= "</a>";
}
if (eregi("center",$image_align)) {
$image .= "</center>";
}
$output_document = eregi_replace("[img=\"([-./a-zA-Z0-9!&%#?,'=:~])\"( align=\"([a-zA-Z0-9])\")?( alt=\"([-./a-zA-Z0-9!&%#?,'=:~$ ()])\")?( border=\"([0-9])\")?( link=\"([-./a-zA-Z0-9!&%#?,'=:~])\")?]",$image,$output_document);
}

Right now, though, it only detects and replaces the first occurence of the [img] tag, and every other occurence will get replaced with whatever's in the first one. I need it to be able to replace multiple different occurences. Anything ideas?

[Anon]

Here ya go, hope this helps ya 😉

<?php
$output_document = "
\n<br> asdf asdf 😃<br><br>\n\n
";

while(preg_match("/[img=\"([-.\/a-zA-Z0-9!&%#?,'=:~])\"( align=\"([a-zA-Z0-9])\")?( alt=\"([-.\/a-zA-Z0-9!&%#?,'=:~$ ()])\")?( border=\"([0-9])\")?( link=\"([-.\/a-zA-Z0-9!&%#?,'=:~]*)\")?]/i",$output_document,$image_data)) {
unset($image); // Clear this so that the image is not appended to previously replaced images

$image_url = $image_data[1];
$image_align = $image_data[3];
$image_alt = $image_data[5];
$image_border = $image_data[7];
$image_link = $image_data[9];
$image_alt = eregi_replace("\'\'","\"",$image_alt);

if (!eregi("^.*/",$image_url) || !eregi("^http[s]*://",$image_url)) {
	$image_url = $siteroot."images/docs/$doc_id/$image_url";
}

if (eregi("center",$image_align)) {
	$image .= "<center>";
}

if (isset($image_data[8])) {
	if (!eregi("^.*/",$image_link) || !eregi("^http[s]*://",$image_link)) {
		$image_link = $siteroot."images/docs/$doc_id/$image_link";
	}

	$image .= "<a href=\"$image_link\">";
}

$image .= "<img src=\"$image_url\"";

if (isset($image_data[2])) {
	$image .= " align=\"$image_align\"";

	if (eregi("left",$image_align) || eregi("right",$image_align)) {
		$image .= " vspace=\"$image_vspace\" hspace=\"$image_hspace\"";
	}
}

if (isset($image_data[4])) {
	$image .= " alt=\"$image_alt\"";
}

if (isset($image_data[6])) {
	$image .= " border=\"$image_border\"";
} else {
	$image .= " border=\"0\"";
}

$image .= ">";

if (isset($image_data[8])) {
	$image .= "</a>";
}

if (eregi("center",$image_align)) {
	$image .= "</center>";
}

$output_document = str_replace($image_data[0],$image,$output_document);

}

echo $output_document;
?>

===========================================
That should do it for ya... I even changed it from eregi to preg_match (it is still case insensitive). Now, here are the things I had to modify in order to get this to run besides placing it in the while loop..

First of all, I had to make sure that instead of using eregi_replace() at the bottom (which would replace ALL occurances with $image) to str_replace() so it would only replace the exact one (or if there are duplicates, but this is OK if they are the exact same).

The other change I had to make was to unset($image) at the top of the while loop so it didn't keep appending data to $image and replacing (you can try it for yourself without unset($image) and you'll know what I mean).

Well anyways, let me know if that helps ya 🙂

[Anon]

Wow! Thanks a lot! Works perfectly!

Turns out that it was the str_replace that was the key to it. Also, it still works too with eregi! =)