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In this article, the editor introduces in detail "how php returns four-digit unsatisfactory zeros". The content is detailed, the steps are clear, and the details are handled properly. I hope this "php how to return four-digit unsatisfactory zeros" article can help you solve your doubts.

In php, you can use the str_pad () function to return four-digit zeros, with the syntax "str_pad ($num,4," 0 ", STR_PAD_RIGHT)"; the parameter "STR_PAD_RIGHT" specifies zeros to the right of the numeric string.

Operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

In php, you can use the str_pad () function to return four digits, if less than four digits are filled with zeros.

Example:

Description:

The str_pad () function fills the string to a new length with the specified character.

Syntax:

Str_pad (string,length,pad_string,pad_type) parameter describes string

Necessary. Specifies the string to fill.

Length is required. Specifies the length of the new string. If the value is less than the length of the original string, nothing is done. Pad_string is optional. A string that specifies the use of padding. The default is blank. Pad_type is optional. Specifies which side of the padding string.

Possible values:

STR_PAD_BOTH-fill both sides of the string. If it is not an even number, the right side gets an additional fill.

STR_PAD_LEFT-fill the left side of the string.

STR_PAD_RIGHT-fill the right side of the string. This is the default.

Example:

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