How to remove the last element from a string in php

php method to remove the last element of a string: 1. Use the substr function to return a part of the string, the syntax format is "substr(string,0,-1)"; 2. Use the rtrim function to remove The blank character or other predefined characters on the right side of the string, the syntax format is "rtrim (string, end character)".

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

Method one:

substr($arr_str, 0, -1)

Detailed explanation: directly use the substr() function to trim the last character in reverse order;

Method 2:

rtrim($arr_str, ",")

Detailed explanation: rtrim ()Function syntax: string rtrim ( string $str [, string $character_mask ] )

rtrim — delete the blank characters (or other characters) at the end of the string

Note: the above After the method operates on the string, it returns the operation result and does not change the string itself! Remember to use a variable to receive the result!

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