I'm making a function call to a library that is returning a malformed json array. I can work around this if I can get a preg written to extract the part that I want.
The array is a jumbled mess, but buried deep inside it is a string that looks like this:
token=??????,
I need to write a preg to grab the characters represented by the question marks. I wrote this, but it's not getting the part of the text that I want:
$token = preg_match('#^(?:token=)?([^,]+)#i', $badJson, $matches);
Can anyone help me? Thanks.
You can try:
/token=([^,]+)/i
and the use the first sub-match to extract the token. Being more specific is usually a good idea with regex (eg. does the token have a set length? does it only contain hex characters? etc.)
Site note: https://leaverou.github.io/regexplained/ is a great site for testing regular expressions.
Related
This problem is driving me nuts. Let's say I have a string:
This is a &start;pretty bad&end; string that I want to &start;somehow&end; display differently
I want to be able to remove the &start; and &end; parts as well as everything in between so it says:
This is a string that I want to display differently
I tried using preg_replace with a regular expression but it took off too much, ie:
This is a display differently
The question is: how do I remove the stuff just between sets of &start; and &end; pairs and make sure that it doesn't remove anything between any &end; and &start; segments?
Keep in mind, I'm working with hundreds of strings that are very different to each other so I'm looking for a flexible solution that'll work with all of them.
Thanks in advance for any help with this.
Edit: Replaced dollar signs with ampersands. Oops!
Try this regex /\&start;(.+?)\$end;/g
It looks like it works as desired: https://regex101.com/r/MW5nom/2
I quickly tried it on chrome console using JS, tried converting it into PHP:
"This is a &start;pretty bad$end; string that I want to &start;somehow$end; display differently".replace(/\&start;(.+?)\$end;/g, "")
im having an issue with preg_match_all. I have this string:
$product_req = "ACTIVE-6,CATEGORY-ACTIVE-8,CATEGORY-ACTIVE-4,ACTIVE-9";
I need to get the numbers preceded by "ACTIVE-" but not by "CATEGORY-ACTIVE-", so in this case the result should be 6,9. I used the statement below:
preg_match_all("/ACTIVE-(\d+)/", $product_req, $this_act);
However this will return all the numbers because all of them are in fact preceded by "ACTIVE-" but thats not what i meant because i need to leave out those preceded by "CATEGORY-ACTIVE-". How can i configure preg_match_all to do it? Or maybe there is some other function that can do the job?
EDIT:
I tried this:
preg_match_all("/CATEGORY-ACTIVE-(\d+)/", $product_req, $this_cat_act);
preg_match_all("/ACTIVE-(\d+)/", $product_req, $this_act);
$act_cat = str_replace($this_cat_act[1],"",$this_act[1]);
it kinda works, but i guess there is a better and cleaner way to do it. Besides the output is kinda weird too.
Thank you.
i have not struggled to understand some regex, but i can't get it right. I am developing a system that understand some codes ind a included file. Simple. But i need to get some pieces from the string sometimes and replace the string with a function.
Example:
Here is the "code" from the included file
{{quicklink("li", "li")}}
and
{{showcase_small("classy_box")}}
Now i have to get these strings and the information inside ("") så that i can replace the string and insert a function with the information:
$showcase->classyBox("${1}")
I have tried many times, but i cant get the wanted information.
Cheers,
From what I have gathered, this should work: http://regex101.com/r/xI7vW4
Very similar to your own expression, so I don't see why yours did not work.
I'm new to php and am trying to write a regular expression using preg_match to extract the href value that I get from my http get.
The response looks:
{"_links":{"http://a.b.co/documents":{"href":"/docs"}}}
I want to extract only the href value and pass it to my next api... i.e. /docs.
Can anyone please tell me how to extract this?
I've been using http://www.solmetra.com/scripts/regex/index.php to test my regex.. and had no luck since last one day :(
please any help would be appreciated.
Thanks,
DR
No need for a regex.
Use json_decode() and then access the href property.
For example:
$data = json_decode('{"_links":{"http://a.b.co/documents":{"href":"/docs"}}}', true);
echo $data['_links']['http://a.b.co/documents']['href'];
Note: I'd encourage you to clean up your JSON if possible. Particularly the keys.
Don't use regex, use json_decode(). JSON is an excellent example of a context-free grammar that you shouldn't even try to parse with regex.
Here's PHP.NET's reference on using json_decode() for just this sort of thing.
Just like HTML parsing, I would recommend not using a REGEX but rather a json parser then reading the value. Check out json_encode and json_decode functions in php.
That said if you just need the href value then here is a regex to do just that on the example you gave
preg_match('/"href":"([^"]+)"/',$string,$matches);
$matches[1];// this is the href
Regex is only the right tool when you know exactly what you want and exactly the format it will be in. Often json and HTML from other parties can't be exactly predicted. There are also examples of certain legal HTML and json which can't properly be parsed with regex so in general use a specialized parser for them.
This question already has answers here:
Closed 12 years ago.
Possible Duplicates:
Identifying if a URL is present in a string
Php parse links/emails
I'm working on some PHP code which takes input from various sources and needs to find the URLs and save them somewhere. The kind of input that needs to be handled is as follows:
http://www.youtube.com/watch?v=IY2j_GPIqRA
Try google: http://google.com! (note exclamation mark is not part of the URL)
Is http://somesite.com/ down for anyone else?
Output:
http://www.youtube.com/watch?v=IY2j_GPIqRA
http://google.com
http://somesite.com/
I've already borrowed one regular expression from the internet which works, but unfortunately wipes the query string out - not good!
Any help putting together a regular expression, or perhaps another solution to this problem, would be appreciated.
Jan Goyvaerts, Regex Guru, has addressed this issue in his blog. There are quite a few caveats, for example extracting URLs inside parentheses correctly. What you need exactly depends on the "quality" of your input data.
For the examples you provided, \b(?:(?:https?|ftp|file)://|www\.|ftp\.)[-A-Z0-9+&##/%=~_|$?!:,.]*[A-Z0-9+&##/%=~_|$] works when used in case-insensitive mode.
So to find all matches in a multiline string, use
preg_match_all('/\b(?:(?:https?|ftp|file):\/\/|www\.|ftp\.)[-A-Z0-9+&##\/%=~_|$?!:,.]*[A-Z0-9+&##\/%=~_|$]/i', $subject, $result, PREG_PATTERN_ORDER);
$result = $result[0];
Why not try this one. It is the first result of Googling "URL regular expression".
((https?|ftp|gopher|telnet|file|notes|ms-help):((\/\/)|(\\\\))+[\w\d:##%\/;$()~_?\+-=\\\.&]*)
Not PHP, but it should work, I just slightly modified it by escaping forward slashes.
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