Menu
I just stuck at this and cannot find solution.
I would like to try to transform a string to lower case using preg_replace.
I just cannot create the right regex.
The reason is that normal strtolower does not support unicode characters.
I know that I could use mb_strtolower but this function seems to be quite slow and beside them not everyone has MB support.
Any clue?
Regards, Radek
EDIT: Ok, thanks alot for your help guys. I think my approach was not quite correct. I think it would be much better to use this: How do I detect non-ASCII characters in a string? and then respectively use either the strtolower or mb_strtolower if available.
358
The preg_replace() function returns a string or array of strings where all matches of a pattern or list of patterns found in the input are replaced with substrings. There are three different ways to use this function: 1. One pattern and a replacement string.
str_replace replaces a specific occurrence of a string, for instance "foo" will only match and replace that: "foo". preg_replace will do regular expression matching, for instance "/f. {2}/" will match and replace "foo", but also "fey", "fir", "fox", "f12", etc.
Find/Replace with Regular Expression (Regex) or Wildcards. Word supports find/replace with it own variation of regular expressions (regex), which is called wildcards. To use regex: Ctrl-H (Find/Replace) ⇒ Check "Use wildcards" option under "More".
The REGEXREPLACE( ) function uses a regular expression to find matching patterns in data, and replaces any matching values with a new string.
Regex is not able to change characters by itself, it can only change their order and/or add additional characters/delete some of them.
There is preg_replace_callback or /e flag, but they can manipulate only with known functions, and therefore can't do better than strtolower.
If you can't rely on existense of mb_strolower function, you will have to implement it yourself.
196
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
