How php substr () removes the last character

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In php, to remove the last character of a string using the substr() function, you simply set the second argument to 0 and the third argument to the string length minus one; the syntax is "substr($string,0,strlen($string)-1)."

Operating environment of this tutorial: Windows 7 system, PHP7.1 version, DELL G3 computer

php substr() removes the last character

The substr() function intercepts a specified length of characters from a specified position in a string and returns. The syntax is as follows:

substr($string, $start , $length)

$string: string to be truncated, the string contains at least one character;

$start: the starting position of the truncated string;

$length: Optional parameter indicating the length of the truncated string.

To remove the last digit of a string using the substr() function, you simply set the second argument,$start, to 0 and the third argument,$length, to the length of the string minus one.

Implementation code:

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