How do I remove the last comma from a string using PHP?

How do I remove the last comma from a string using PHP?

php string substr

php

php substr() function with utf-8 leaves � marks at the end

php utf-8 substr

php

Delete first 3 characters and last 3 characters from String PHP

php string character strip substr

php

Using PHP substr() and strip_tags() while retaining formatting and without breaking HTML

php html substr strip-tags

php

Extract a substring between two characters in a string PHP

php substr

php

PHP function substr() error

php substr

php

Using PHP's substr() with special characters at the end results in question marks

php substr

php

How to retrieve the last 4 characters from a mysql database field?

php mysql substr

php

PHP substr but keep HTML tags?

php substr

php

Put dash between every third character

php string replace substr

php

PHP substr after a certain char, a substr + strpos elegant solution?

php substr strpos

php

How to get first x chars from a string, without cutting off the last word?

php string substr

php

How efficient is PHP's substr?

php optimization memory-management substr

php

Show 1k instead of 1,000

php function numbers substr

php