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In PHP, you can use the str_pad() function to pad the string with 0s. This function can fill a string with specified characters to a specified length. You only need to set the third parameter to "0" to fill in the missing length with 0. The syntax is "str_pad(string, specified length, '0', type )"; the parameter "type" specifies the padding direction. The value "STR_PAD_BOTH" is filled on both sides, the value "STR_PAD_LEFT" is filled with the left side, and the value "STR_PAD_RIGHT" is filled with the right side.
The operating environment of this tutorial: Windows 7 system, PHP version 8.1, DELL G3 computer
In PHP, you can use str_pad The () function realizes filling in 0 if the string is missing.
str_pad() function can fill the string to a new length, that is, fill the string to the specified length with the specified characters.
str_pad(string,length,pad_string,pad_type)
| Parameters | Description |
|---|---|
| string | Required . Specifies the string to be filled. |
| length | Required. Specifies the length of the new string. If the value is less than the length of the original string, no operation is performed. |
| pad_string | Optional. Specifies the string used for padding. The default is blank. |
| pad_type | Optional. Specifies which side of the string to fill. Possible values:
|
You only need to set the third parameter pad_string to "0" to fill in the missing length with 0.
Example:
"; echo "补位后：".str_pad($str,10,"0")."
"; echo "补位后：".str_pad($str,10,"0",STR_PAD_BOTH)."
"; echo "补位后：".str_pad($str,10,"0",STR_PAD_LEFT)."
"; ?>
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