Fully end to end encrypted anonymous chat program. Server only stores public key lookup for users and the encrypted messages. No credentials are transfered to the server, but kept in local browser storage. This allows 100% safe chatting.
https://safechat.ch
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35 lines
932 B
35 lines
932 B
<?php |
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/*! @file |
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@id $Id$ |
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*/ |
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// 1 2 3 4 5 6 7 8 |
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// 45678901234567890123456789012345678901234567890123456789012345678901234567890 |
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/// Check if a user exists |
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/** Check if a user exists in the server's user table. |
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@param $user user name to check |
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@return json encoded value: |
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- 'user name as string', if user does exist |
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- null, if user does not exist or in case of error |
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@api Check If User Exists |
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*/ |
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function checknewuser($user) { |
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try { |
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require_once("opendb.php"); |
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$dbuser = $db->real_escape_string($user); |
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$q = $db->query("select * from user where name='$dbuser';"); |
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if (!$q) error("server database error: ".$db->error); |
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if ($q->num_rows==0) { |
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echo json_encode($user); |
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} else { |
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echo json_encode(null); |
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} |
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} catch (Exception $e) { |
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echo json_encode(null); |
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} |
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} |
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checknewuser($_REQUEST['user']); |
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?>
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