Having trouble with a regular expression (they are not my strong suit). I'm trying to match all strings between {{ and }}, but if a set of brackets occurs on the same line, it counts that as a single match... Example:
$string = "
Hello, kind sir
{{SHOULD_MATCH1}} {{SHOULD_MATCH2}}
welcome to
{{SHOULD_MATCH3}}
";
preg_match_all("/{{(.*)}}/", $string, $matches);
var_dump($matches); // returns arrays with 2 results instead of 3
returns:
array(2) {
[0]=>
array(2) {
[0]=>
string(35) "{{SHOULD_MATCH1}} {{SHOULD_MATCH2}}"
[1]=>
string(17) "{{SHOULD_MATCH3}}"
}
[1]=>
array(2) {
[0]=>
string(31) "SHOULD_MATCH1}} {{SHOULD_MATCH2"
[1]=>
string(13) "SHOULD_MATCH3"
}
}
Any help? Thanks!
Replace the * quantifier with its non-greedy form *?.
This will make it match as little as possible while still allowing the expression to match as a whole, which is different from its current behavior of matching as much as possible.
You can use one the following patterns.
{{(.+?)}
{{([^}]+)
{{(\w+)
{{([[:digit:][:upper:]_]+)
{{([\p{Lu}\p{N}_]+)
Related
The zeros can be incremented but it must be of four digits, so it could be CEC0152-2005
Of course with a "-" between them.
I used www.txt2re.com to generate this patern but it didn't help me.
Maybe,
^[A-Z]{3}[0-9]{4}-[0-9]{4}$
or,
^CEC[0-9]{4}-[0-9]{4}$
might work fine.
Test
$re = '/^[A-Z]{3}[0-9]{4}-[0-9]{4}$/m';
$str = 'CEC0152-2005
CEC0152-2019
CEC0152-1999
CEC0152-19991';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
var_dump($matches);
Output
array(3) {
[0]=>
array(1) {
[0]=>
string(12) "CEC0152-2005"
}
[1]=>
array(1) {
[0]=>
string(12) "CEC0152-2019"
}
[2]=>
array(1) {
[0]=>
string(12) "CEC0152-1999"
}
}
If you wish to simplify/modify/explore the expression, it's been explained on the top right panel of regex101.com. If you'd like, you can also watch in this link, how it would match against some sample inputs.
RegEx Circuit
jex.im visualizes regular expressions:
If after the dash we'd have a four-digit year,
^[A-Z]{3}[0-9]{4}-[12][0-9]{3}$
^CEC[0-9]{4}-[12][0-9]{3}$
might also work fine, I guess.
Demo 2
I have a pattern. Whenever a specific matching group is not present, it skips and find another match even if it skips the next matching group.
There are 4 capturing group.
first group, 2nd group, 3rd group, 4th group
3rd group is not always there. In my sample string, there are 3 sets. The first one does not contain any character for the 3rd group. I want a conditional statement for the 3rd group. If it does not found any character, then it should capture blank or space.
Demo: https://regex101.com/r/zK0aW4/1
it should be like this: https://regex101.com/r/sD4eB7/1
but I don't know how to assign condition for this.
If third match is not present then it should get blank. How do I write this in regex pattern?
For example:
$string = "\nTHIS IS FIRST PATTERN 63101 0789158126 0-0000000-000-0000\n4415 THIS IS FIRST \nPATTERN 49401-9528\n0406842931 Third match 0-0000000-000-0000\n11403 THIS IS FIRST PATTERN 49401-\n9595\n0112853789 Third match 0-0000000-000-0000";
preg_match_all(
"/([A-Z ,\.\-\&#\\\\n\/0-9&]+)(\d{10})([A-Z a-z]+)(\d{1}-\d{7}-\d{3}-\d{4}|\d{1}-\d{7}-\d{2}-\d{4})/",
$string,
$matches
);
This should output something like:
array(3) {
[0]=>
array(3) {
[0]=>
string(78) "\nTHIS IS FIRST PATTERN 63101 0789158126 0-0000000-000-0000"
[1]=>
string(84) "\n4415 THIS IS FIRST \nPATTERN 49401-9528\n0406842931 Third match 0-0000000-000-0000"
[2]=>
string(87) "\n11403 THIS IS FIRST PATTERN 49401-\n9595\n0112853789 Third match 0-0000000-000-0000"
}
[1]=>
array(5) {
[0]=>
string(36) "\nTHIS IS FIRST PATTERN 63101"
[1]=>
string(42) "\n4415 THIS IS FIRST \nPATTERN 49401-9528\n"
[2]=>
string(45) "\n11403 THIS IS FIRST PATTERN 49401-\n9595\n"
}
[2]=>
array(3) {
[0]=>
string(10) "0789158126"
[1]=>
string(10) "0406842931"
[2]=>
string(10) "0112853789"
}
[3]=>
array(3) {
[0]=>
string(15) " "
[1]=>
string(15) " Third match "
[2]=>
string(15) " Third match "
}
[4]=>
array(3) {
[0]=>
string(17) "0-0000000-000-0000"
[1]=>
string(17) "0-0000000-000-0000"
[2]=>
string(17) "0-0000000-000-0000"
}
}
Try this: https://regex101.com/r/zK0aW4/2
((?:[A-Z ,.&#\/0-9-]|&|\\n)+?)(\d{10})([A-Z a-z]+)?(\d{1}-\d{7}-\d{3}-\d{4}|\d{1}-\d{7}-\d{2}-\d{4})
Because your initial group has so many matches it was extending too far. By changing to a non-greedy or lazy match (*? or +?) it will match as little as possible. This makes it behave better with the following patterns.
Character classes (surrounded by [ and ]) are for matching single characters; I assumed that you wanted to match only a literal & and \n, so moved those out of the character class.
In PHP I have the following string:
$text = "test 1
{blabla:database{test}}
{blabla:testing}
{option:first{A}.Value}{blabla}{option:second{B}.Value}
{option:third{C}.Value}{option:fourth{D}}
{option:fifth}
test 2
";
I need to get all {option...} out of this string (5 in total in this string). Some have multiple nested brackets in them, and some don't. Some are on the same line, some are not.
I already found this regex:
(\{(?>[^{}]+|(?1))*\})
so the following works fine :
preg_match_all('/(\{(?>[^{}]+|(?1))*\})/imsx', $text, $matches);
The text that's not inside curly brackets is filtered out, but the matches also include the blabla-items, which I don't need.
Is there any way this regex can be changed to only include the option-items?
This problem is far better suited to a proper parser, however you can do it with regex if you really want to.
This should work as long as you're not embedding options inside other options.
preg_match_all(
'/{option:((?:(?!{option:).)*)}/',
$text,
$matches,
PREG_SET_ORDER
);
Quick explanation.
{option: // literal "{option:"
( // begin capturing group
(?: // don't capture the next bit
(?!{option:). // everything NOT literal "{option:"
)* // zero or more times
) // end capture group
} // literal closing brace
var_dumped output with your sample input looks like:
array(5) {
[0]=>
array(2) {
[0]=>
string(23) "{option:first{A}.Value}"
[1]=>
string(14) "first{A}.Value"
}
[1]=>
array(2) {
[0]=>
string(24) "{option:second{B}.Value}"
[1]=>
string(15) "second{B}.Value"
}
[2]=>
array(2) {
[0]=>
string(23) "{option:third{C}.Value}"
[1]=>
string(14) "third{C}.Value"
}
[3]=>
array(2) {
[0]=>
string(18) "{option:fourth{D}}"
[1]=>
string(9) "fourth{D}"
}
[4]=>
array(2) {
[0]=>
string(14) "{option:fifth}"
[1]=>
string(5) "fifth"
}
}
Try this regular expression - it was tested using .NET regular expressions, it may work with PHP as well:
\{option:.*?{\w}.*?}
Please note - I'm assuming that you have only 1 pair of brackets inside, and inside that pair you have only 1 alphanumeric character
I modified your initial expression to search for the string '(option:)' appended with non-whitespace characters (\S*), bounded by curly braces '{}'.
\{(option:)\S*\}
Given your input text, the following entries are matched in regexpal:
test 1
{blabla:database{test}}
{blabla:testing}
{option:first{A}.Value} {option:second{B}.Value}
{option:third{C}.Value}
{option:fourth{D}}
{option:fifth}
test 2
If you don't have multiple pairs of brackets on the same level this should works
/(\{option:(([^{]*(\{(?>[^{}]+|(?4))*\})[^}]*)|([^{}]+))\})/imsx
I'm trying to capture a line with n-number of words that follow a title sequence in PHP, but I cannot capture anything more than the first word. Here are the contents of the file that I am trying to match:
Name: test
Caption: test test test test
And here is the regular expression code and results...
preg_match_all('/([A-z]+:)\s*(\w+)[\r|\r\n|\n]*/', $contents, $array);
Results:
array(3) {
[0]=> array(2) {
[0]=> string(11) "Name: test "
[1]=> string(14) "Caption: test "
}
[1]=> array(2) {
[0]=> string(5) "Name:"
[1]=> string(8) "Caption:"
}
[2]=> array(2) {
[0]=> string(4) "test"
[1]=> string(4) "test"
}
}
Any help would be greatly appreciated.
Assuming that your input data always looks like your example (title segment, colon, words; all on a single line), this should do it:
preg_match_all('/([A-Za-z]+:)\s*(.*)/', $contents, $array);
This would result in $array[1] matching something like Name:, and then $array[2] would match the rest of the line (you may have to use trim() to strip any leading and/or trailing white space from $array[2]).
If you only want to capture "words" in the second part, I believe you could change the second capture group to something like:
preg_match_all('/([A-Za-z]+:)\s*([\w\s]+)/', $contents, $array);
Note also that you shouldn't use the [A-z] construct, since there are non-alphabetical characters in the ASCII table between the upper case letters and the lower case letters. See the ASCII Table for a character map.
I'm attempting to use regexp to parse a search string that from time to time may contain special syntax. The syntax im looking for is [special keyword : value] and i want each match put into an array. Keep in mind that the search string will contain other text that is not intended to be parsed.
$searchString = "[StartDate:2010-11-01][EndDate:2010-11-31]";
$specialKeywords = array();
preg_match("/\[{1}.+\:{1}.+\]{1}/", $searchString, $specialKeywords);
var_dump($specialKeywords);
Output:
array(1) { [0]=> string(43) "[StartDate:2010-11-01] [EndDate:2010-11-31]" }
Desired Output:
array(2) { [0]=> string() "[StartDate:2010-11-01]"
[1]=> string() "[EndDate:2010-11-01]"}
Please let me know if i am not being clear enough.
Your .+ matches across the boundaries between the two [...] parts because it matches any character, and as many of them as possible. You could be more restrictive about which characters may be matched. Also {1} is redundant and can be dropped.
/\[[^:]*:[^\]]*\]/
should work more reliably.
Explanation:
\[ # match a [
[^:]* # match any number of characters except :
: # match a :
[^\]]* # match any number of characters except ]
\] # match a ]
This:
$searchString = "[StartDate:2010-11-01][EndDate:2010-11-31]";
preg_match_all('/\[.*?\]/', $searchString, $match);
print_r($match);
gives the expected result, I'm not sure if it matches all the constraints.
Try the following:
$searchString = "[StartDate:2010-11-01][EndDate:2010-11-31]";
$specialKeywords = array();
preg_match_all("/\[\w+:\d{4}-\d\d-\d\d\]/i", $searchString, $specialKeywords);
var_dump($specialKeywords[0]);
Outputs:
array(2) {
[0]=>
string(22) "[StartDate:2010-11-01]"
[1]=>
string(20) "[EndDate:2010-11-31]"
}
Use this regex: "/\[(.*?)\:(.*?)\]{1}/" and also use preg_match_all, it will return
array(3) {
[0]=>
array(2) {
[0]=>
string(22) "[StartDate:2010-11-01]"
[1]=>
string(20) "[EndDate:2010-11-31]"
}
[1]=>
array(2) {
[0]=>
string(9) "StartDate"
[1]=>
string(7) "EndDate"
}
[2]=>
array(2) {
[0]=>
string(10) "2010-11-01"
[1]=>
string(10) "2010-11-31"
}
}
/\[.+?\:.+?\]/
I suggest this method, less complex but it handles the same as tim's