How to split the string and take the first few bits in php

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In PHP, you can use the substr() function to split the first few characters of a string. The function can return a part of the specified string. You can specify where to start splitting and the length to be cut through parameters. The syntax is "substr(string, 0, first few digits)".

Operating environment of this tutorial: Windows 10 system, PHP7.1 version, DELL G3 computer

How does PHP split the first few digits of a string?

The substr() function returns a portion of a string.

Note: If the start argument is negative and length is less than or equal to start, length is 0.

syntax

substr(string,start,length)

The parameter settings are shown in the table below:

Examples are as follows:

Output:

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