Chinese character encryption and decryption, in order to solve the problem of Chinese characters being lost during transmission
<code><span>$urlstr</span> = urlencode(<span>"我是codekissyoung"</span>); <span>echo</span> urldecode(<span>$urlstr</span>);</code>
Irreversible encryption md5 hash value, sha1 hash value
<code><span>echo</span> md5(<span>"hehexiix23"</span>);
<span>echo</span> crypt(<span>$some_string</span>,<span>'keyvalue'</span>);
<span>$str</span> = <span>'apple'</span>;
<span>if</span> (sha1(<span>$str</span>) === <span>'d0be2dc421be4fcd0172e5afceea3970e2f3d940'</span>) {
<span>echo</span><span>"Would you like a green or red apple?"</span>;
}</code>Reversible encryption
<code>base64_encode(<span>$string</span>); base64_decode(<span>$string</span>); convert_uudecode(<span>$str</span>); convert_uuencode(<span>$str</span>);</code>
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The above introduces PHP encryption and decryption, including aspects of the content. I hope it will be helpful to friends who are interested in PHP tutorials.
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