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Most people do not understand the knowledge points of this article "php how to hide 6-digit ID number", so the editor summarizes the following content, detailed content, clear steps, and has a certain reference value. I hope you can get something after reading this article. Let's take a look at this "php how to hide 6-digit ID number" article.

Hiding method: 1, using "substr_replace ($str,str_repeat (" * ", 6),-6)" statement, you can hide the last 6 bits; 2, using "substr_replace ($str,str_repeat (" * ", 6), 6)" statement, you can hide the middle 6 bits.

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

In PHP, you can use the substr_replace () function and substr_replace () function to hide the ID number and replace the hidden number with an asterisk.

1. Hide the last 6-digit ID number

2. Hide the middle 6-digit ID number

3. Hide the first 6 ID numbers

Description:

The substr_replace () function replaces part of a string with another string; it replaces a string of the specified length starting at the specified location.

The str_repeat () function repeats the string a specified number of times.

In the above example, the asterisk "*" character is repeated a specified number of times (consistent with the number of digits to be hidden), and the substring produced is used as a replacement value to replace part of the string.

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