Use PHP to carry out simple character encryption_PHP tutorial

I had nothing to do and wanted to try encryption, so I used PHP, which I am familiar with, to write it...

Principle:

Convert the characters into ASCII codes, then convert the ASCII codes, convert the results into characters again, and the encryption is completed.

　?

Implementation:

Enter the characters to be encrypted:

error_reporting(255);

　if ( isset($val) )

　{

　?//Encrypt

　??for($i=0; $i

　?{

　??$c = $value[$i];

　??$c = ord($c);

　??if ( $c>31 && $c<107 )

　??{

　???$c = $c+20;

　???print( "Characters before encryption: ". $val );

　???print( "

Encrypted characters: ". chr($c) );

　???print( "

　");

　??}?

　??elseif ( $c>106 && $c<127)

　??{

　???$c = $c-75;

　???print( "Characters before encryption: ". $val );

　???print( "

Encrypted characters: ". chr($c) );

　???print( "

　");??

　??}

　?}

　}

else

　{

　?print("Please enter the characters you want to encrypt");

　}

　?>

When converting asc, you should pay attention to some issues. For example, asc is from 0-127, so when converting, there should be no asc greater than 127 or less than 0. This must be controlled well. It is best to list the results yourself. Take a look at the table.

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http://www.bkjia.com/PHPjc/820404.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/820404.htmlTechArticleI had nothing to do and wanted to try encryption, so I used PHP, which I am familiar with, to write... Principle: Convert characters into ASCII codes, then convert the ASCII codes, convert the results into characters, and the encryption is completed...