<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<link rel="stylesheet" href="StylesTSL.css" type="text/css" media="screen">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Terraria Server List</title>
</head>
<body>
<div id="page">
<div id="logobase">
<div class="filler"></div>
<center><img src="logo.png" width="400" height="100"/></center>
</div>
<div class="filler"></div>
<div id="form">
<center>
<h1>Add a server!</h1>
<form action="" method="post">
Title: <input type="text" name="title" /><br />
IP & Port: <input type="text" name="ip" />(E.G: 127.0.0.1:7777)<br />
Description:<br />
<textarea name="desc"></textarea><br />
E-Mail: <input type="text" name="email" /><br />
Type: <select name='type'><option value="Hamachi" selected>Hamachi</option><option value="Non-Hamachi">Non-Hamachi</option></select><br />
<input type="submit" name="submit" value="Submit server!" />
</form>
</center>
</div>
<div class="filler"></div>
<?php
//Our variables
$title = $_POST['title'];
$ip = $_POST['ip'];
$desc = $_POST['desc'];
$type = $_POST['type'];
$email = $_POST['email'];
$submit = $_POST['submit'];
//Connect to our DB
$con = mysql_connect("localhost", "x", "x");
mysql_select_db("bobrocke_users", $con) or die("Could not select database");
if ($submit) {
if (strlen($title) == 0) {
die("Invalid title!");
}
else if (strlen($title) >= 51) {
die("Invalid title!");
}
else if (strlen($ip) == 0) {
die("Invalid IP!");
}
else if (strlen($ip) >= 51) {
die("Invalid IP!");
}
else if (strlen($desc) == 0) {
die("Invalid description!");
}
else if (strlen($email) == 0) {
die("Invalid E-Mail!");
}
else if (strlen($email) >= 101) {
die("Invalid E-Mail!");
}
else {
mysql_query("INSERT INTO `Servers` (`ip`, `desc`, `type`, `title`, `email`) VALUES('".$ip."', '".$desc."', '".$type."', '".$title."', '".$email."')") or die(mysql_error());
}
}
$get_all = mysql_query("SELECT * FROM Servers");
while ($row = mysql_fetch_assoc($get_all)) {
?>
<div class="servbox">
<center>
<h1><?php echo $row['title']?></h1><br /></center>
IP: <span class="ip"><?php echo $row['ip']?></span><br /><hr />
<p><?php echo $row['desc']?></p><br /><br />
<a href="http://bobcraft-games.com/TSL/page.php?id=<?php echo $row['id'] ?>">Server's Page</a><br />
Type: <?php echo $row['type']?><br /><br />
</div>
<div class="filler"></div>
<?php
}
?>
</div>
</body>
</html>
好吧,我要做的是限制用户发布无效的空白字段。
无论出于何种原因,这些措施if (strlen($submittedValue) == 0)
或其他。
答案 0 :(得分:2)
你最好在PHP中使用empty()
函数来检查变量是否为空(如strlen(...) == 0
)
并且:不要忘记mysql_real_escape_string()
变量!
答案 1 :(得分:1)
使用trim()消除字符串开头和结尾的任何空格。使用空(trim($ var))来检查。
由于您在使用utf-8时想要计算字符数,请使用mb_strlen()http://php.net/manual/en/function.mb-strlen.php
答案 2 :(得分:0)
为什么不简单地使用if (!$somestring) ...
?空字符串将测试为false
,null
也是如此 - 只要$somestring
无法设置为非字符串值(null
除外),应该工作正常。例如:
...
if (!$title) {
die("Invalid title!");
}
else if (strlen($title) >= 51) {
die("Invalid title!");
}
...
这也将捕获表单数据中未提交$title
的情况。
在查询中使用它们时,也应该转义字符串。所以:
mysql_query("INSERT INTO `Servers` (`ip`, `desc`, `type`, `title`, `email`) VALUES('".$ip."', '".$desc."', '".$type."', '".$title."', '".$email."')") or die(mysql_error());
..应该成为:
mysql_query("INSERT INTO `Servers` (`ip`, `desc`, `type`, `title`, `email`) VALUES('".
mysql_real_escape_string($ip)."', '".
mysql_real_escape_string($desc)."', '".
mysql_real_escape_string($type)."', '".
mysql_real_escape_string($title)."', '".
mysql_real_escape_string($email)."')")
or die(mysql_error());
否则,人们可能会通过将SQL重要字符和代码放入表单数据来搞乱您的查询。
答案 3 :(得分:0)
如果某些代码没有合作,我会做以下事情:
首先,让我们拿走你的original example code并摆脱与手头的具体问题无关的一切。离开validation code that uses strlen。所以,我们现在可以更清楚地看到了。
我想从你的代码中可以看出:
我创建一个html / php脚本纯粹是为了测试引起悲伤的php。例如,将其称为FormFieldValidatorTest.php
。测试脚本与网站项目一起使用,但仅供我运行。因此,我将其放入受密码保护的目录或公众无法访问的其他位置。
我想要一个 UTF-8 html页面,提交一些已知长度的字符串。说,这封信&#39; a&#39;我们知道的是一个字符长,一个空字段&#39;我们知道它是零个字符。
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>My Test</title>
</head>
<body>
<form action="" method="get">
<input name="singleCharacterString" type="text" value="a" size="1" maxlength="1">
<input name="emptyString" type="text" value="" size="1" >
<input type="submit" name="Submit" value="Run Tests">
</form>
...
然后,在FormFieldValidatorTest.php
的顶部,我写了一些PHP代码:
为了保持清洁,我将测试代码的内容放入一个函数中,称之为runTestSuite()
,它将在下面充实。
<?php
//FormFieldValidatorTest.php
if ( $_REQUEST['Submit'] == 'Run Tests' ) {
//perform the tests
$testResultsArray = runTestSuite();
/**
* Lets loop through the results and count the failures
*/
$failureCounter = 0;
foreach ( $testResultsArray as $result ) {
if ( $result['hasFailed'] ) {
$failureCounter++;
}
}
} else {
//no tests were run set the results to null
$testResultsArray = null;
}
?>
<html>
...
我在FormFieldValidatorTest.php
的html部分添加了一些php。这应该打印出结果(如果$testResultsArray
与null
不同):
<?php
//FormFieldValidatorTest.php
...
?>
<html>
...
<body>
<form action="" method="get">
...
</form>
<?php if ( $testResultsArray !== null ) : ?>
<h1>Results</h1>
<pre>
<?php if ( $failureCounter > 0 ) : ?>
Failed. <?php echo $failureCounter ?> tests failed.
<?php print_r( $testResultsArray ); ?>
<?php else : ?>
Passed
<?php endif; ?>
</pre>
<?php endif; ?>
</body>
</html>
然后,我填写了runTestSuite()
函数的内容。这基本上是对assertTrue()
函数的两次调用,我将在后面充实。
1
时strlen返回singleCharacterString
是真的。 0
时strlen返回emptyString
是真的。同时传递描述每个测试的消息。这些存储在结果数组中,以便在测试失败时帮助调试。
/**
* @desc A suite of tests to excercise that troublesome code
* @return array of results for each test done
*/
function runTestSuite() {
/**
* Lets Run some tests
*/
/**
* Create the results array
*/
$testResultsArray = array();
/**
* Test some known data submitted via a form parameter
*/
assertTrue(
( strlen( $_REQUEST['singleCharacterString'] ) == 1 ),
'Expect it to be TRUE that singleCharacterString http parameter
has a stringlength of 1',
$testResultsArray );
/**
* @todo Add more tests here.
*/
assertTrue(
( strlen( $_REQUEST['emptyString'] ) == 0 ),
'Expect it to be TRUE that emptyString http parameter
has a stringlength of 0',
$testResultsArray );
return $testResultsArray;
}
最后,我充实了assertTrue()
功能。这基本上测试了第一个参数是否已失败断言测试。然后,它会将结果和message
作为$testResultsArray
中的记录附加。
/**
* @desc A TRUE assertion
* @param mixed - a value that we expect to be true
* @param string - a message to help understand what we are testing
* @param array - a collection of results so far passed by reference
* @return void
*/
function assertTrue( $value, $message, &$testResultsArray ) {
if ( $value ) {
//value is as asserted
$currentResult = array(
'message' => $message,
'hasFailed' => FALSE
);
} else {
//value is not as asserted
$currentResult = array(
'message' => $message,
'hasFailed' => TRUE
);
}
$testResultsArray[] = $currentResult;
}
现在测试脚本已完成。 See it here
如果我运行它并看到它通过,我可以确定strlen是合作的。如果它失败了我可以继续:
为了做到这一点,你可能需要能够将行为不当的位分成一个单独的函数或类,它位于自己的文件中。这使得可重用,因此可以从测试代码和实时生产代码中调用它。
我们真正应该测试的是长度规则,它指定只允许某些长度的字符串。
所以,让我们隔离一下,这样我们就可以测试它了。可能是名为ServerValidationRules.php
<?php
//ServerValidationRules.php
/**
* @desc boolean function to test string length
* @param string to test
* @param integer defining minimum length required
* @param integer defining maximum length required
* @return TRUE if its the correct length, FALSE otherwise.
*/
function isCorrectLength( $string, $minLength, $maxLength ) {
if ( strlen( $string ) < $minLength ) {
//its too short
return FALSE;
}
if ( strlen( $string ) > $maxLength ) {
//its too long
return FALSE;
}
return TRUE;
}
然后我们可以替换测试中的代码,而不是使用原生的strlen()
函数。
<?php
//FormFieldValidatorTest.php
require_once('ServerValidationRules.php');
...
/**
* @desc A suite of tests to excercise that troublesome code
* @return array of results for each test done
*/
function runTestSuite() {
$testResultsArray = array();
/**
* Test some known data submitted via a form parameter
*/
assertTrue(
//( strlen( $_REQUEST['singleCharacterString'] ) == 1 ),
isCorrectLength( $_REQUEST['singleCharacterString'], 0, 1 ),
'Expect it to be TRUE that singleCharacterString http parameter
has a stringlength of 1',
$testResultsArray );
/**
* @todo Add more tests here.
*/
assertTrue(
//( strlen( $_REQUEST['emptyString'] ) == 0 ),
isCorrectLength( $_REQUEST['emptyString'], 0, 0 ),
'Expect it to be TRUE that emptyString http parameter
has a stringlength of 0',
$testResultsArray );
return $testResultsArray;
}
...
因此,我们现在可以将生产脚本中的代码替换为:
<title>Terraria Server List</title>
...
<?php
...
if ( $submit ) {
if (!( isCorrectLength( $title, 0, 50 ) )) {
die("Invalid title!");
}
elseif (!( isCorrectLength($ip, 0, 50) )) {
die("Invalid IP!");
}
elseif (!( isCorrectLength( $desc, 0, 10000 ) )) {
die("Invalid description!");
}
elseif (!( isCorrectLength( $email, 0, 100 ) )) {
die("Invalid E-Mail!");
}
else {
//do the insert
}
}
...
或者,更好的是,将 length 规则移动到单个函数中,以便逻辑可以被其他代码重复使用(即测试套件中的某些代码)。
我们可以将所有这些内容包装到一个名为isServerFieldsValid
的函数中,并将其放入我们的ServerValidationRules.php
文件中。
<?php
//ServerValidationRules.php
...
/**
* @desc tests user-submitted fields appending feedback to an array of messages upon failure.
* @param associative array of Posted values keyed by field name
* @param array of messages passed by reference
* @return boolean True if all fields are valid. False otherwise.
*/
function isServerFieldsValid( $values, &$messages ) {
$hasFailed = FALSE;
if (!( isCorrectLength( $values['title'], 1, 50 ) )) {
$hasFailed = TRUE;
$messages[] = "Invalid title!";
}
if (!( isCorrectLength($values['ip'], 1, 50) )) {
$hasFailed = TRUE;
$messages[] = "Invalid IP!";
}
if (!( isCorrectLength( $values['desc'], 1, 1000 ) )) {
$hasFailed = TRUE;
$messages[] = "Invalid description!";
}
if (!( isCorrectLength( $values['email'], 1, 100 ) )) {
$hasFailed = TRUE;
$messages[] = "Invalid E-Mail!";
}
if ( $hasFailed ) {
return FALSE;
}
//else
return TRUE;
}
然后在我们的测试脚本中为测试套件函数添加一些更多的断言。
...
/**
* @desc A suite of tests to excercise that troublesome code
* @return array of results for each test done
*/
function runTestSuite() {
/**
* Initialize the results array
*/
$testResultsArray = array();
...
/**
* Test some variants of possible user submitted data
*
* @todo We ought to invoke an assertFalse() function.
* In meantime, hack it by passing a negated value to assertTrue().
*/
/**
* When given values that are too long,
* expect a validation failure.
*/
$validationMessages = array();
$result = isServerFieldsValid(
array(
'title' => str_repeat( 'a' , 51 ),
'ip' => str_repeat( 'a' , 51 ),
'desc' => str_repeat( 'a' , 1001 ),
//?'type' => str_repeat( 'a' , 1001 ),
'email' => str_repeat( 'a' , 101 ),
),
$validationMessages
);
assertTrue(
(!( $result )),
'Expect it to be TRUE that result is False when given long values',
$testResultsArray );
assertTrue(
in_array( 'Invalid title!', $validationMessages ),
'Expect messages to say "Invalid title!"',
$testResultsArray );
assertTrue(
in_array( 'Invalid IP!', $validationMessages ),
'Expect messages to say "Invalid IP!"',
$testResultsArray );
assertTrue(
in_array( 'Invalid description!', $validationMessages ),
'Expect messages to say "Invalid description!"',
$testResultsArray );
assertTrue(
in_array( 'Invalid E-Mail!', $validationMessages ),
'Expect messages to say "Invalid E-Mail!"',
$testResultsArray );
/**
* When given values that are too short,
* expect a validation failure.
*/
$validationMessages = array();
$result = isServerFieldsValid(
array(
'title' => null,
'ip' => null,
'desc' => null,
'email' => null,
),
$validationMessages
);
assertTrue(
(!( $result )),
'Expect it to be TRUE that result is False when given short values',
$testResultsArray );
assertTrue(
in_array( 'Invalid title!', $validationMessages ),
'Expect messages to say "Invalid title!"',
$testResultsArray );
assertTrue(
in_array( 'Invalid IP!', $validationMessages ),
'Expect messages to say "Invalid IP!"',
$testResultsArray );
assertTrue(
in_array( 'Invalid description!', $validationMessages ),
'Expect messages to say "Invalid description!"',
$testResultsArray );
assertTrue(
in_array( 'Invalid E-Mail!', $validationMessages ),
'Expect messages to say "Invalid E-Mail!"',
$testResultsArray );
/**
* When given values that are the correct length,
* expect a validation success.
*/
$validationMessages = array();
$result = isServerFieldsValid(
array(
'title' => 'a title',
'ip' => 'an ip',
'desc' => 'a desc',
'email' => 'an email',
),
$validationMessages
);
assertTrue(
( $result ),
'Expect it to be TRUE that result is True when given correct values',
$testResultsArray );
assertTrue(
(!( in_array( 'Invalid title!', $validationMessages ) )),
'Expect messages NOT to say "Invalid title!"',
$testResultsArray );
assertTrue(
(!( in_array( 'Invalid IP!', $validationMessages ) )),
'Expect messages NOT to say "Invalid IP!"',
$testResultsArray );
assertTrue(
(!( in_array( 'Invalid description!', $validationMessages ) )),
'Expect messages NOT to say "Invalid description!"',
$testResultsArray );
assertTrue(
(!( in_array( 'Invalid E-Mail!', $validationMessages ) )),
'Expect messages NOT to say "Invalid E-Mail!"',
$testResultsArray );
return $testResultsArray;
}
...
所以,完整的测试脚本now looks like this。
因此,如果通过,我们可以通过调用那个经过良好测试的新if (strlen ) { die }
函数替换所有isServerFieldsValid()
语句来修改生产代码:
<title>Terraria Server List</title>
...
if ( $submit ) {
$messages = array();
if (!( isServerFieldsValid( $_POST, $messages ) )) {
echo 'Invalid data was submitted:' . PHP_EOL;
foreach( $messages as $message ) {
echo $message . PHP_EOL;
}
exit;
} else {
//do the insert
}
...
嗯,这就是我如何处理不合作的代码。
代码:
FormFieldValidatorTest.php
ServerValidationRules.php
changes
我花了几个小时来写这个答案,但很少有时间来编写实际测试。一旦养成习惯,通常只需几分钟就可以完成测试,并找出为什么有些代码没有合作。
提示:您不需要编写自己的断言函数。 请参阅:http://www.simpletest.org/en/start-testing.html