As the title says
I want to insert or replace, a comma ( ,) into a string.
I have this string : A fits B fits C fits D. I want to insert comma behind every fits and right after the word before fits.
This is the desired result : A, fits B, Fits C, Fits D
The code I am using to achieve that is :
$newstr = substr_replace($oldstr,", ",stripos($oldstr,"fits")-1,0);
However, this code only insert 1 comma in the first occurrence of "fits".
I tried using substr_count() to get the count of fits occurring and then uses For loop but the comma is stacked in the position of the first occurrence of fits.
like this : A,,, Fits B Fits C Fits D
There must be a way to achieve the desired result, it has to be with adding more than one position in substr_replace() function or something right?
EDIT
The string I have is White Fits Black Fits Red Fits Blue
The desired result is White, Fits Black, Fits Red, Fits Blue
The comma , is placed behind every Fits word in the string AND right after the word behind fits
the key point of my question is : How to put comma in behind every fits word AND right after the word behind fits
Thanks before
Use preg_replace:
$input = "A fits B Fits C Fits D";
$output = preg_replace("/\b([A-Z]+)(?=\s)/", "$1,", $input);
echo $input . "\n" . $output;
This prints:
A fits B Fits C Fits D
A, fits B, Fits C, Fits D
Here is an explanation of the regex pattern:
\b([A-Z]+) match AND capture one or more uppercase letters, which are preceded by a word boundary (?=\s) then assert that what follows is a space; this prevents a final letter from being assigned a comma, should the input end in a letter
Then, we replace with $1, the captured letter(s), followed by a comma.
Edit:
For your recent edit, you may use:
$input = "White Fits Black Fits Red Fits Blue";
$output = preg_replace("/\b(?=\s+Fits\b)/", ",", $input);
echo $input . "\n" . $output;
This prints:
White Fits Black Fits Red Fits Blue
White, Fits Black, Fits Red, Fits Blue