i want to get a particular value from string in php. Following is the string
$string = 'users://data01=[1,2]/data02=[2,3]/*';
preg_replace('/(.*)\[(.*)\](.*)\[(.*)\](.*)/', '$2', $str);
i want to get value of data01. i mean [1,2].
How can i achieve this using preg_replace?
How can solve this ?
preg_replace() is the wrong tool, I have used preg_match_all() in case you need that other item later and trimmed down your regex to capture the part of the string you are looking for.
$string = 'users://data01=[1,2]/data02=[2,3]/*';
preg_match_all('/\[([0-9,]+)\]/',$string,$match);
print_r($match);
/*
print_r($match) output:
Array
(
[0] => Array
(
[0] => [1,2]
[1] => [2,3]
)
[1] => Array
(
[0] => 1,2
[1] => 2,3
)
)
*/
echo "Your match: " . $match[1][0];
?>
This enables you to have the captured characters or the matched pattern , so you can have [1,2] or just 1,2
preg_replace is used to replace by regular expression!
I think you want to use preg_match_all() to get each data attribute from the string.
The regex you want is:
$string = 'users://data01=[1,2]/data02=[2,3]/*';
preg_match_all('#data[0-9]{2}=(\[[0-9,]+\])#',$string,$matches);
print_r($matches);
Array
(
[0] => Array
(
[0] => data01=[1,2]
[1] => data02=[2,3]
)
[1] => Array
(
[0] => [1,2]
[1] => [2,3]
)
)
I have tested this as working.
preg_replace is for replacing stuff. preg_match is for extracting stuff.
So you want:
preg_match('/(.*?)\[(.*?)\](.*?)\[(.*?)\](.*)/', $str, $match);
var_dump($match);
See what you get, and work from there.
Related
I have a very long string of html. From this string I want to parse pairs of rus and eng names of cities. Example of this string is:
$html = '
Абакан
Хакасия республика
Абан
Красноярский край
Абатский
Тюменская область
';
My code is:
$subject = $this->html;
$pattern = '/<a href="([\/a-zA-Z0-9-"]*)">([а-яА-Я]*)/';
preg_match_all($pattern, $subject, $matches);
For trying I use regexer . You can see it here http://regexr.com/399co
On the test used global modifier - /g
Because of in PHP we can't use /g modifier I use preg_match_all function. But result of preg_match_all is very strange:
Array
(
[0] => Array
(
[0] => <a href="/forecasts5000/russia/republic-khakassia/abakan">Абакан
[1] => <a href="/forecasts5000/russia/krasnoyarsk-territory/aban">Абан
[2] => <a href="/forecasts5000/russia/tyumen-area/abatskij">Аба�
[3] => <a href="/forecasts5000/russia/arkhangelsk-area/abramovskij-ma">Аб�
)
[1] => Array
(
[0] => /forecasts5000/russia/republic-khakassia/abakan
[1] => /forecasts5000/russia/krasnoyarsk-territory/aban
[2] => /forecasts5000/russia/tyumen-area/abatskij
[3] => /forecasts5000/russia/arkhangelsk-area/abramovskij-ma
)
[2] => Array
(
[0] => Абакан
[1] => Абан
[2] => Аба�
[3] => Аб�
)
)
First of all - it found only first match (but I need to get array with all matches)
The second - result is very strange for me. I want to get the next result:
pairs of /forecasts5000/russia/republic-khakassia/abakan and Абакан
What do I do wrong?
Element 0 of the result is an array of each of the full matches of the regexp. Element 1 is an array of all the matches for capture group 1, element 2 contains capture group 2, and so on.
You can invert this by using the PREG_SET_ORDER flag. Then element 0 will contain all the results from the first match, element 1 will contain all the results from the second match, and so on. Within each of these, [0] will be the full match, and the remaining elements will be the capture groups.
If you use this option, you can then get the information you want with:
foreach ($matches as $match) {
$url = $match[1];
$text = $match[2];
// Do something with $url and $text
}
You can also use T-Regx library which has separate methods for each case :)
pattern('<a href="([/a-zA-Z0-9-"]*)">([а-яА-Я]*)')
->match($this->html)
->forEach(function (Match $match) {
$match = $match->text();
$group = $match->group(1);
echo "Match $match with group $group"
});
I also has automatic delimiters
I have the following text string:
-asc100-17-asc100-17A-asc100-17BPH-asc100-17ASL
What regex code do I need to extract the values so that they appear in the matches array like this:
-asc100-17
-asc100-17A
-asc100-17BPH
-asc100-17ASL
Thanks in advance!
You may try this:
$str = "-asc100-17-asc100-17A-asc100-17BPH-asc100-17ASL";
preg_match_all('/-asc\d+-[0-9a-zA-Z]+/', $str, $matches);
// Print Result
print_r($matches);
Output:
Array
(
[0] => Array
(
[0] => -asc100-17
[1] => -asc100-17A
[2] => -asc100-17BPH
[3] => -asc100-17ASL
)
)
Based on the very limited information in your question, this works:
-asc100-17[A-Z]*
Debuggex Demo
If you want to capture the post -asc100- code, then use
-asc100-(17[A-Z]*)
Which places 17[the letters] into capture group one.
Might use preg_split with a lookahead as well for your scenario:
print_r(preg_split('/(?=-asc)/', $str, -1, PREG_SPLIT_NO_EMPTY));
Are you trying to break the string in an array? Then why regex is required? This function can handle what you want:
$arr = explode('-asc', '-asc100-17-asc100-17A-asc100-17BPH-asc100-17ASL');
foreach ($arr as $value) {
if(!empty($value)){
$final[] = '-asc'.$value;
}
}
print_r($final);
Output array : Array ( [0] => -asc100-17 [1] => -asc100-17A [2] => -asc100-17BPH [3] => -asc100-17ASL )
I want to find the no of occurences of a sustring(pattern based) inside another string.
For example:
$mystring = "|graboard='KERALA'||graboarded='KUSAT'||graboard='MG'";
I want to find the no of graboards present in the $mystring,
So I used the regex for this, But how will I find the no of occurrence?
If you must use a regex, preg_match_all() returns the number of matches.
Use preg_match_all:
$mystring = "|graboard='KERALA'||graboarded='KUSAT'||graboard='MG'";
preg_match_all("/(graboard)='(.+?)'/i", $mystring, $matches);
print_r($matches);
will yield:
Array
(
[0] => Array
(
[0] => graboard='KERALA'
[1] => graboard='MG'
)
[1] => Array
(
[0] => graboard
[1] => graboard
)
[2] => Array
(
[0] => KERALA
[1] => MG
)
)
So then you can use count($matches[1]) -- however, this regex may need to be modified to suit your needs, but this is just a basic example.
Just use preg_match_all():
// The string.
$mystring="|graboard='KERALA'||graboarded='KUSAT'||graboard='MG'";
// The `preg_match_all()`.
preg_match_all('/graboard/is', $mystring, $matches);
// Echo the count of `$matches` generated by `preg_match_all()`.
echo count($matches[0]);
// Dumping the content of `$matches` for verification.
echo '<pre>';
print_r($matches);
echo '</pre>';
I am trying to find all matches in a string. For some reason if my match is at the start of the string it is not returning that particular match. Does it have something to do with index 0? I am also using PREG_OFFSET_CAPTURE to get the indexes vs. the matches. Below is the code of working an non-working.
$text = '[QUOTE]I wonder why[QUOTE]PHP[IMG]hates me[/IMG][/QUOTE][/QUOTE][URL="http://www.bing.com"]Click me![QUOTE]........[/QUOTE]Ok Bai![/URL]';
preg_match_all('#\[QUOTE\]#', $text, $matches, PREG_OFFSET_CAPTURE, PREG_PATTERN_ORDER);
print_r($matches);
The result of which is:
Array ( [0] => Array ( [0] => Array ( [0] => [QUOTE] [1] => 19 ) [1] => Array ( [0] => [QUOTE] [1] => 100 ) ) )
As you can see it only found two matches. If I add a character to the start of the string it will then find all three.
$text = 'a[QUOTE]I wonder why[QUOTE]PHP[IMG]hates me[/IMG][/QUOTE][/QUOTE][URL="http://www.bing.com"]Click me![QUOTE]........[/QUOTE]Ok Bai![/URL]';
preg_match_all('#\[QUOTE\]#', $text, $matches, PREG_OFFSET_CAPTURE, PREG_PATTERN_ORDER);
print_r($matches);
The result of which is:
Array ( [0] => Array ( [0] => Array ( [0] => [QUOTE] [1] => 1 ) [1] => Array ( [0] => [QUOTE] [1] => 20 ) [2] => Array ( [0] => [QUOTE] [1] => 101 ) ) )
All three matches. If anyone can help me figure out if my REGEX needs to be modified or if there is some quirk I'm unaware of it would be much appreciated. I've tried this same thing utilizing Python and the re library and it returns all my matches. I also utilized this http://www.regextester.com/ and it reports it as working in both scenarios and matching everything as it should. My only guess is something to do with the PREG_OFFSET_CAPTURE finding a match at position 0 and the 0 causing some issue.
Thanks in advance for any assistance!
The correct way to add multiple flags is with a pipe |, so:
preg_match_all('#\[QUOTE\]#', $text, $matches, PREG_OFFSET_CAPTURE | PREG_PATTERN_ORDER);
Your , before PREG_PATTERN_ORDER means it becomes the 'offset' parameter (at which point in the string to start), and as PREG_PATTERN_ORDER==1, it starts at the second character.
The problem is in your function call:
preg_match_all('#\[QUOTE\]#', $text, $matches, PREG_OFFSET_CAPTURE, PREG_PATTERN_ORDER);
The fifth parameter is the offset, not another flag.
I would like to know how to get multiple occurrences from a regex.
$str = "Some validations <IF TEST>firstValue</IF> in <IF OK>secondValue</IF> end of string.";
$do = preg_match("/<IF(.*)>.*<\/IF>/i", $str, $matches);
This is what I've done so far. It works if I have only 1 , but if I have more it doesn't return the right values. Here is the result:
Array ( [0] => firstValue in secondValue [1] => TEST>firstValue in
I need to get the "TEST" and the "OK" values.
EDIT: I've brought the modifications suggested, thanks a lot it works fine ! However, I am now trying to add a elsif parameter and can't get it to work well. Here is what I've done:
$do = preg_match_all("~<IF([^<>]+)>([^<>]+)(</IF>|<ELSEIF([^<>]+)>([^<>]+)</IF>)~", $str, $matches, PREG_SET_ORDER);
and the results is
Array
(
[0] => Array
(
[0] => firstValuesecondValue
[1] => TEST
[2] => firstValue
[3] => secondValue
[4] => TEST1
[5] => secondValue
)
[1] => Array
(
[0] => thirdValue
[1] => OK
[2] => thirdValue
[3] =>
)
)
Is there a way to make my array more clean ? It has many elements which are useless like the [0][4] etc.
You should make the regex more specific. The .* that you are using should either be less greedy, or better yet disallow other angle brackets:
~<IF([^<>]+)>([^<>]+)</IF>~i
More importantly, you should use preg_match_all, not just preg_match.
preg_match_all("~<IF([^<>]+)>([^<>]+)</IF>~i", $str, $matches, PREG_SET_ORDER);
That'll give you a nested array like:
[0] => Array
(
[0] => <IF TEST>firstValue</IF>
[1] => TEST
[2] => firstValue
)
[1] => Array
(
[0] => <IF OK>secondValue</IF>
[1] => OK
[2] => secondValue
)
The answers pointing out that you should use preg_match_all are correct.
But there is another problem: the .* is greedy by default. This will cause it to match both tags in a single match, so you need to make the star non-greedy (i.e. lazy):
/<IF(.*?)>.*?<\/IF>/i
Use this code:
$string = "Some validations <IF TEST>firstValue</IF> in <IF OK>secondValue</IF> end of string.";
$regex = "/<IF (.*?)>.*?<\/IF>/i";
preg_match_all($regex, $string, $matches);
print_r($matches[1]);
You regex is good but you have to use the non-greedy mode adding the ? char and use the preg_match_all() function.
Use a non-greedy match .*? and preg_match_all for this purpose.