How to delete the last digit of a string in php

php method to delete the last digit of a string: 1. Use the [substr()] function, the code is [substr($arr_str,0,strlen($arr_str)-1)]; 2. Use [ rtrim()] function, the code is [rtrim($arr_str, ",")].

php method to delete the last digit of the string:

Method one:

substr($arr_str,0,strlen($arr_str)-1);

Detailed explanation: Substr () Function grammar: String Substr (String $ String, Int $ Start [, Int $ LENGTH])

# stelen () Function: int strlen (string $string)

Principle of this example:

First use the strlen() function to determine the length of the string

$arr_str, and then use the substr() function to $ Intercept arr_str to the penultimate digit of $arr_str. This removes the last ",".

Usage experience:

Not recommended, there is a simpler and more useful way in PHP!

Method 2:

substr($arr_str, 0, -1)

Detailed explanation: directly use the

substr() function to cut off the last character in reverse order;

Usage experience: It is still very suitable~~However, first you have to make sure that there must be content in the string, and the last digit must not be included!

Method three:

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

Usage experience:

This is just for this Need to prepare!

Note: After the above 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!

Related free learning recommendations:

php programming (video)

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