所以我创建了一个html表单，它将信息提供给包含html表单的文档，并且我希望进行php检查以确保特定字段中包含信息，我的代码如下所示。
<?php
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
$errors = array();
if ( ! isset($_POST['dbname'])) {
array_push($errors,'dbname');
}
if ( ! isset($_POST['dbpass'])) {
array_push($errors, 'dbpass');
}
if ( ! isset($_POST['dbhost'])) {
array_push($errors, 'dbhost');
}
if ( ! isset($_POST['prefix'])) {
array_push($errors, 'prefix');
}
if (isset($_POST['dbname']) && trim($_POST['dbname']) != '' {
echo "something";
}
else
{
echo "nothing";
}
if (count($errors) > 0) {
$error_msg = implode('<br>', $errors);
show_form($error_msg);
}
else {
do_install();
echo 'Install Done';
}
}
else {
// show the form
show_form();
}
给我带来麻烦的线路是
if (isset($_POST['dbname']) && trim($_POST['dbname']) != ''
基本上，我认为这一行基本上会说"如果字段dbname被设置，并且在修剪时它的值等于某个值，那么就这样做，如果不这样做，那么就这么做"，但当我在整个过程中添加这一行时，它就坏了，不再在浏览器中显示任何内容。
如果你需要它，我文件的其余部分看起来像这个
function show_form($msg = '') {
?>
<html>
<body>
<?php if (isset($msg) && trim($msg) != '') { echo $msg; } ?>
<P> HI </P>
<form action="hi.php" method="POST">
<p>Your Database name and user: <input type="text" name="dbname" /><br />
Your database password <input type="text" name="dbpass" /> <br/>
Your DB_HOST (ip address) <input type ="text" name = "dbhost" /> <br/>
Your desired table prefix <input type ="text" name = "prefix" /> <br />
</p>
<p><input type="submit" value="Send it!"></p>
</form>
<?php
}
?>
<?php
function recurseRmdir($di) {
$files = array_diff(scandir($di), array('.','..'));
foreach ($files as $file) {
(is_dir("$di/$file")) ? recurseRmdir("$di/$file") : unlink("$di/$file");
}
return rmdir($di);
}
?>
<?php
function do_install() {
chdir(__DIR__);
$dir = getcwd(); /** stores the directory that the php file is in as a variable */
file_put_contents($dir . '/wordpress.zip', file_get_contents('http://wordpress.org/latest.zip'));
$zip = new ZipArchive;
$zip->open('wordpress.zip');
$zip->extractTo($dir);
$zip->close();
unlink($dir . '/wordpress/wp-content/plugins/hello.php');
recurseRmdir($dir . '/wordpress/wp-content/plugins/akismet');
recurseRmdir($dir . '/wordpress/wp-content/themes/twentyfourteen');
recurseRmdir($dir . '/wordpress/wp-content/themes/twentythirteen');
recurseRmdir($dir . '/wordpress/wp-content/themes/twentytwelve');
file_put_contents ($dir . '/wpbfboilerplate.zip', file_get_contents ('/home/wpbfboilerplate.zip'));
$zip = new ZipArchive;
$zip->open('wpbfboilerplate.zip');
$zip->extractTo($dir);
$zip->close();
unlink($dir . '/wordpress.zip');
unlink($dir . '/wpbfboilerplate.zip');
rename($dir . '/wordpress/wp-config-sample.php', $dir . '/wordpress/wp-config.php');
$contents = file_get_contents($dir . '/wordpress/wp-config.php');
$new_contents = str_replace('database_name_here',$dbname, $contents);
file_put_contents('wordpress/wp-config.php', $new_contents);
$contents = file_get_contents($dir . '/wordpress/wp-config.php');
$new_contents = str_replace('username_here', $dbname, $contents);
file_put_contents('wordpress/wp-config.php', $new_contents);
$contents = file_get_contents($dir . '/wordpress/wp-config.php');
$new_contents = str_replace('localhost', $dbhost, $contents);
file_put_contents('wordpress/wp-config.php', $new_contents);
$contents = file_get_contents($dir . '/wordpress/wp-config.php');
$new_contents = str_replace('password_here', $dbpass, $contents);
file_put_contents('wordpress/wp-config.php', $new_contents);
$contents = file_get_contents($dir . '/wordpress/wp-config.php');
$new_contents = str_replace("'$table_prefix = 'wp_';", "'$table_prefix =" . "'" . $prefix . "'", $contents);
file_put_contents('wordpress/wp-config.php', $new_contents);
}
?>
应该是if（isset（$_POST['dbname']）&；trim（$_POST['dbname']）！=''）｛我只是忘记了括号！xD
你可以试试这个
if(!$_POST['dbname']){
$data['Error']='Please enter DB Name.';
show_form($data['Error']); // show the form
}elseif(!$_POST['dbpass']){
$data['Error']='Please enter DB password.';
show_form($data['Error']); // show the form
}elseif(!$_POST['dbhost']){
$data['Error']='Please enter DB Host.';
show_form($data['Error']); // show the form
}elseif(!$_POST['prefix']){
$data['Error']='Please enter DB Prefix.';
show_form($data['Error']); // show the form
}else{
do_install();
echo 'Install Done';
}
做一些这样的事情，我希望上面会有所帮助。