How to remove the last character from a php string

Removal method: 1. Use substr() and strlen() functions to remove, syntax "substr($arr_str,0,strlen($arr_str)-1)"; 2. Use substr() function to remove directly , the syntax is "substr($arr_str, 0, -1)"; 3. Use the rtrim() function to remove, the syntax is "rtrim($arr_str, ",")".

The operating environment of this tutorial: windows7 system, PHP8 version, DELL G3 computer

Delete the last digit in PHP Summary of character methods:

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

Detailed explanation:

substr() function syntax: string substr ( string $string , int $start [, int $length ] )

strlen() function syntax: int strlen (string $string)

Principle of this example:

First use the strlen() function to get the length of the string $arr_str, and then use the substr() function to modify $arr_str Intercept, intercept 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 3: 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:

It’s simply Prepared for this need!

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