How to get the number of string in php

The way PHP retrieves the number of a string is to pass the string as a parameter to the substr function, and set the starting point and the length of the string to be returned, for example [substr("Hello world", 6)].

The operating environment of this article: windows10 system, php 7.3, thinkpad t480 computer.

php has a very rich function library, including a function substr(), which can take out any part of the string. Returns FALSE on failure, or an empty string.

Syntax:

substr(string,start,length)

Parameters:

• string Required. Specifies a part of the string to be returned.

• #start Required. Specifies where in the string to begin.

• #length Optional. Specifies the length of the string to be returned. The default is until the end of the string.

Code example:

Running result:

world

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