How to replace last comma in string with "and" using php?

Question

I'm trying to replace the last occurence of a comma in a text with "and" using strrchr() and str_replace().

Example:

$likes = 'Apple, Samsung, Microsoft';
$likes = str_replace(strrchr($likes, ','), ' and ', $likes);

But this replaces the entire last word (Microsoft in this case) including the last comma in this string. How can I just remove the last comma and replace it with " and " ?

I need to solve this using strrchr() as a function. That's why this question is no duplicate and more specific.

Possible duplicate of PHP Replace Last Occurence of a String in a String? — Thamilhan
– Thamilhan, Commented Jan 20, 2017 at 11:47
@Thamilhan You should actually read the question first before reporting everything as duplicate... — AlexioVay
– AlexioVay, Commented Apr 2, 2023 at 17:57

Masteruniversal · Accepted Answer · 2017-01-20 12:17:18Z

12

To replace only the last occurrence, I think the better way is:

$likes = 'Apple, Samsung, Microsoft';
$likes = substr_replace($likes, ' and', strrpos($likes, ','), 1);

strrpos finds the position of last comma, and substr_replace puts the desired string in that place replacing '1' characters in this case.

answered Jan 20, 2017 at 12:17

Masteruniversal

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2 Comments

Alberto Suárez Over a year ago

If $likes='Apple' , this function returns ' andpple'

Stefan Apr 29 at 9:22

I don't understand why this is the accepted answer, when the above comment applies, as I have also verified.

Mohammad · Accepted Answer · 2017-01-20 11:56:23Z

5

You can use regex to find last comma in string. Php preg_replace() replace string with another string by regex pattern.

$likes = 'Apple, Samsung, Microsoft';
$likes = preg_replace("/,([^,]+)$/", " and $1", $likes)

Check result in demo

answered Jan 20, 2017 at 11:56

Mohammad

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1 Comment

You Old Fool Over a year ago

you can also do preg_replace('/,(?=[^,]*$)/',' and', $likes);

Wei Jing · Accepted Answer · 2019-01-08 22:00:49Z

4

just provide the answer with function strrchr()

$likes = 'Apple, Samsung, Microsoft';
$portion = strrchr($likes, ',');
$likes = str_replace($portion, (" and" . substr($portion, 1, -1)), $likes);

because strrchr() will

This function returns the portion of string

See Doc here

so we just need only replace the comma symbol should be fine. and the comma will be always the first character when you use strrchr()

See Demo here

answered Jan 8, 2019 at 22:00

Wei Jing

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Comments

Franz Gleichmann · Accepted Answer · 2017-01-20 11:47:35Z

1

first, you gotta separate the elements into an array with all but the last one, and the last one. then you put them back together with commas and an "and", respectively

$likes = "A, B, C";
$likes_arr = explode(",", $likes);
$last = array_pop($likes_arr);
$likes = implode(",", $likes_arr) . " and" . $last;
echo $likes; //"A, B and C";

however: don't forget to check if you actually have enough elements. this fails for inputs without comma.

answered Jan 20, 2017 at 11:47

Franz Gleichmann

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3 Comments

jitendrapurohit Over a year ago

Warning: array_pop() expects parameter 1 to be array

Rajesh Baskaran Over a year ago

We can use if($last) { $likes = implode(",", $likes_arr) . " and" . $last; echo $likes; //"A, B and C"; } for fails of input without comma

Franz Gleichmann Over a year ago

@RajeshBaskaran no. not in that way, because for the input "A", $likes_arr becomes ["A"], so $last will be "A" which evaluates to true.

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