解析错误:语法错误、意外的“”(T_CONSTANT_ENCAPSED_STRING)、预期变量(T_VARIABLE)或[duplicate]中的'{'或'$'

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PHP parse/syntax errors; and how to solve them? 13 answers
PHP解析/语法错误;如何解决它们呢?13个答案

I am a beginner in PHP and I can not resolve this error, thank you for your answers.It is a simple connection to a database in MySQL with columns:

我是一个PHP初学者，我无法解决这个错误，谢谢您的回答。这是一个简单的连接到MySQL数据库的列:

Name
Last Name
Email

Parse error:

解析错误:

syntax error, unexpected '""' (T_CONSTANT_ENCAPSED_STRING), expecting variable (T_VARIABLE) or '{' or '$' in C:\xampp\htdocs\Suscribe\registro.php on line 7

语法错误、意外的“”(T_CONSTANT_ENCAPSED_STRING)、预期变量(T_VARIABLE)或“{”或“$”在C:\xampp\htdoc \Suscribe\registro。php在第7行

$db_host="localhost";
$db_user="root";
$db_password="";
$db_name="prueba";
$db_table_name="datos";
   $db_connection = mysql_connect("$localhost", "$root","");

if (!$db_connection) {
    die('No se ha podido conectar a la base de datos');
}
$Nombre = utf8_decode($_POST['nombre']);
$Apellido = utf8_decode($_POST['apellido']);
$Email = utf8_decode($_POST['email']);
$resultado=mysql_query("SELECT * FROM ".$datos." WHERE Email = '".$Email."'", $db_connection);

if (mysql_num_rows($resultado)>0){
    header('Location: Fail.html');
}else{
    $insert_value = 'INSERT INTO `' . $prueba. '`.`'.$datos.'` (`nombre` , `apellido` , `email`) VALUES 
    ("' . $Nombre . '", "' . $Apellido . '", "' . $Email . '")';
    mysql_select_db($prueba, $db_connection);
    $retry_value = mysql_query($insert_value, $db_connection);
    if (!$retry_value){
        die('Error: ' . mysql_error());
    }
    header('Location: Success.html');
}
mysql_close($db_connection);

2 个解决方案

#1

mysql is deprecated you should use mysqli or pdo

不赞成使用mysql或pdo

Change

改变

$db_connection = mysql_connect("$localhost", "$root","");

来

$db_connection = mysql_connect($localhost, $root,"");

And one more thing you didn't connect DB too

还有一件事你没有连接DB

you should write

你应该写

mysql_select_db($db_name);

Just after mysql_connect

后首先

#2

try this

试试这个

<?php 

$db_host="localhost";
$db_user="root";
$db_password="";
$db_name="prueba";
$db_table_name="datos";
   $db_connection = mysql_connect($db_host, $db_user,$db_password);

if (!$db_connection) {
    die('No se ha podido conectar a la base de datos');
}
$Nombre = utf8_decode($_POST['nombre']);
$Apellido = utf8_decode($_POST['apellido']);
$Email = utf8_decode($_POST['email']);

$resultado=mysql_query("SELECT * FROM ".$db_table_name." WHERE Email = '".$Email."'", $db_connection);

if (mysql_num_rows($resultado)>0)
{

header('Location: Fail.html');

} else {

    $insert_value = 'INSERT INTO `' . $prueba. '`.`'.$datos.'` (`nombre` , `apellido` , `email`) VALUES 
    ("' . $Nombre . '", "' . $Apellido . '", "' . $Email . '")';

mysql_select_db($db_name, $db_connection);
$retry_value = mysql_query($insert_value, $db_connection);

if (!$retry_value) {
   die('Error: ' . mysql_error());
}

header('Location: Success.html');

}

mysql_close($db_connection);

i'm change this $db_connection = mysql_connect("$localhost", "$root","");

我将这个$db_connection = mysql_connect(“$localhost”、“$root”、“”);

to $db_connection = mysql_connect($db_host, $db_user,$db_password);,

$db_connection = mysql_connect($db_host， $db_user，$db_password);

this $resultado=mysql_query("SELECT * FROM ".$datos." WHERE Email = '".$Email."'", $db_connection);

$resultado=mysql_query("SELECT * FROM ".$datos ")。电子邮件= '”。美元电子邮件。“”,db_connection美元);

to $resultado=mysql_query("SELECT * FROM ".$db_table_name." WHERE Email = '".$Email."'", $db_connection); AND this

到$resultado=mysql_query("SELECT * FROM ".$db_table_name。"电子邮件= '”。美元电子邮件。“”,db_connection美元);这

`mysql_select_db($prueba, $db_connection);`

to mysql_select_db($db_name, $db_connection);

mysql_select_db(db_name,db_connection美元);

#1