problem with eregi_replace. help???

niroshan

Hi everone,

i want to replace src attribute of the img tag where it shows the domain name plus the image URL. initially it only has the image url not the full url.

this is what i wrote,

@$text="<img src='aaa.jpge' height='11'>"; 

 $text1 = eregi_replace("src=(\"|'| )*(\"|'| )", "\\0www.zeelabs.com/\\1",$text);  

print @$text1;

This is working fine only if the src attibute value is inside the single quote or double quote.

but some times people dont use single or double quotes before the src value. in this case my replace fail. because now this function can not find single or double quote before the = so it wont replace the string.

does anybody no how to modify my existing function so it replace even there is no quotes.

waiting for a speedy reply..

thanx in advance,
regards,
Niroshan

MrPixel

Assuming $string is a complete HTML <img /> tag, this will work in all cases

eregi_replace('(src=("|\\')?)(.*)("|\\')?', '\\\1http://domain.com\\\2\\\3', $string);

Remember to escape the single quotes inside the expression.

niroshan

HI,
first of all thanx for replying. i used u r eregi_replace function but it didnt gave me the correct answer i was looking for.this is the condition,

@$text="<img src=\"images/aaa.jpge\" height='11'> kjhkjh<img src=\"aaa.jpge\" height='11'> bbbb <img src='aaa.jpge' height='11'>   lkjhkljl <img src=aaa.jpge height='11'>";

 $text1 = eregi_replace('(src=("|\')?)(.*)("|\')?', '\1http://domain.com\2\3',$text);

 print @$text1;

but it gave me the output as,

<img src="http://domain.com"images/aaa.jpge height='11'> kjhkjh<img src="aaa.jpge" height='11'> bbbb <img src='aaa.jpge' height='11'> lkjhkljl <img src=aaa.jpge height='11'>

but this is not what i wanted. then i did some changes in u r code and wrote my own condition and hopefully it worked. but there is a drawback. here is the code i wrote and the out put i got,


@$text="<img src=\"images/aaa.jpge\" height='11'> kjhkjh<img src=\"aaa.jpge\" height='11'> bbbb <img src='aaa.jpge' height='11'>   lkjhkljl <img src=aaa.jpge height='11'>"; 

$text1 = eregi_replace("src=(\"|')*(\"|')|src=|background=(\"|')*(\"|')|background=", "\\0www.domain.com/\\1",$text); 

print @$text1;

in above code i replace both src and background properties with domain name.

OUTPUT

<img src="www.domain.com/images/aaa.jpge" height='11'> kjhkjh<img src="www.domain.com/aaa.jpge" height='11'> bbbb <img src='www.domain.com/aaa.jpge' height='11'> lkjhkljl <img src=www.domain.com/aaa.jpge height='11'>

the drawback is,

*)if the src or background already had the domain name then it will replace again where as i dont want to do anything in that case.
eg:<img src="www.domain.com/http://domain.com/images/aaa.jpge" height='11'>

does anybody no how to solve this problem.

every comments highly welcome.

thanx in advance,

regards,
niroshan

Weedpacket

[man]preg_replace[/man]'s syntax, though more complicated, is also more powerful.

$newtext = preg_replace(
	'#<img(.+?)src\\s*=\\s*(["\\\\'])(?!http://www\\.example\\.com/)(.*?)\\2(.*?)>#is',
	'<img\\1src=\\2http://www.example.com/\\3\\2\\4>"',
	$text);

I think I upset vBulletin's syntax highlighting. Tough.

MrPixel

Originally posted by Weedpacket
[man]preg_replace[/man]'s syntax, though more complicated, is also more powerful.

Not to mention faster.

niroshan

Hi,
thanx for every post. 🙂

I used the syntax u posted and it worked. but it can not handle src tags which didnt have single quotes or double quotes.

eg: <img src=aaa.jpg> will return the same out put instead of <img src=http://www.domain.com/aaa.jpg>

as i go to my original question basically the expression i used previously worked on any condition but the problem is it can not identify is there http://domain.com already exist in the src attribute or not. so it replace the src attribute even thoug it has the domain name.

so what i need is use the not (!) condition so i can ommit the src attibutes which has domain name. but i really dont know where to use it. this is my original syntax,

@$text="<img src=\"http://www.domain.com/aaa.jpge\" height='11'> kjhkjh<img src=\"aaa.jpge\" height='11'> bbbb <img src='aaa.jpge' height='11'>   lkjhkljl <img src=aaa.jpge height='11'>  <td background=xx.jpg>     <td background='xx.jpg'>    <td background=\"xx.jpg\">        <td background=\"images/xx.jpg\">";  

$text1 = eregi_replace("src=([\"'])*([\"'])|src=|background=([\"'])*([\"'])|background=", "\\0www.domain.com/\\1",$text);

print @$text1;

if u didnt undestood my question please ask.
thanx in advance..

regards,
niroshan

Weedpacket

Originally posted by niroshan
I used the syntax u posted and it worked. but it can not handle src tags which didnt have single quotes or double quotes.

It would be simpler to handle that case separately. You don't have to do everything at once; though if you wanted you could try changing ["'] to ["']? and seeing if that works.

Oh, and if you want to use that negative assertion (?! ....), you're going to have to use PCRE functions like preg_replace(). POSIX regex syntax doesn't have assertions.

niroshan

Hi,
ok if i get this straight . u means ereg_replace does not support not(!) condition????

so like u suggest i wrote it in preg_place function but i dont no where to use the not (!) condition..😕

i tryed my code using the not condition infront like,

preg_replace("#!src=([\"'])http://www.domain.com|src=([\"'])*([\"'])|src=|background=([\"'])*([\"'])|background=#is", "\\0www.domain.com/\\1",$text);

but it didnt do anything to the output.

there what i try to do is if the src attribute has http://www.domain.com then ommit the result else i have to replece it according to my conditions.

what is wrong with this code. sorry as i told i`m really new to this regular expressions....

thanx,
regards,
niroshan

Weedpacket

The code I gave originally gives an example of using a negative assertion in preg_replace. b[/b]some pattern will try to make a match with assertion first; and only if that fails will it go on to try matching with some pattern.

There are of course positive assertions as well.