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I need the regular expression to replace using following rule:
Any integer present before . then no take place.
If no integer present before . then that should be replace.
$input = (contain anything characters, symbols, numbers, floats etc)
Example:
$myString = "Example 1.58 Stack.68";
Output should be
Example 1.58 Stack,68
preg_replace('#(?<!\d)\.#',',',$myString)
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I know there are tons of questions about regex string format, but I am very new to this and I haven't been able to do it myself. How can I use regex to match a string with the following format?
xx_x_a.zip
where x is a number and a is a letter. Example:
33_2_f.zip
It must not match:
33_2_f_abc.zip
The format must always be like 2digits+_+1digit+_+1letter+.zip
Simplest way:
/^[0-9]{2}_[0-9]_[a-z]\.zip$/
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I have a string mystring. I have to replace the alternate characters with x so that final output is mxsxrxnx. All the alternate characters starting from 2nd position are replaced with x. I can do it with loop but is there a Regular expression for that or a better way in PHP? Please help.
Using a reset match meta-character \K you are able to do it:
.\K.
Live demo
PHP:
echo preg_replace('/.\K./', 'x', 'mystring'); // mxsxrxnx
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I have a string of the form
<something>_string_t_<digits>
How can I extract just the <digits> portion in PHP ? I need to detect the string_t first and then pull out the digits.
You want something like this:
$captures;
preg_match('/string_t_(\d+)/', $string, $captures);
do_something($captures[1]);
$captures[1] will contain <digits> (assuming <digits> is composed entirely of numbers - if it's not, use the more general (.+) in place of (\d+)).
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Using php+mysql how can i get an item from database with a criteria as shown below.
Check if string lookat(which is 'look at' without space) exist in Take an in-depth look at Wednesday's World Cup semifinal
If you have a lot of data in your table, this wouldn't be ideal. But you could do something like.
WHERE REPLACE(column, " ", "") LIKE "%lookat%"
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I need a pattern which is able to find a word wrapped in two signal characters.
Basically something like
$string = "bablabla __test__ blablabla"
preg_match("/__\w__/", $string, $result);
print_r($result);
\w is a single word character. It would match __t__ but not multiple characters like __test__. Try \w+