Use substr () to remove the last character of the string

Use substr () to remove the last character of the string

"," Must be used to separate the data in the statistical chart. However, when I use a loop to accumulate strings, it is inevitable that there will be one more ",". For example, delete the comma (,) at the end of the string to get, and 5. "," Must be used to separate the data in the statistical chart. However, when I use a loop to accumulate strings, it is inevitable that there will be one more ",". For example, delete the comma (,) at the end of the string to get, and 5.Solution: Use the substr method of php. Syntax: string substr (string, int start, int [length]); parameter 1: Original string; parameter 2: start position of the cut; parameter 3: the truncation length. use $ newstr = substr ($ str, 0, strlen ($ str)-1) as follows, it is intercepted until the second to the last, so that the last "," is removed.