Fatal编程技术网
  • php/
  • Php 如果搜索结果不存在，则隐藏表

Php 如果搜索结果不存在，则隐藏表

php mysql search

Php 如果搜索结果不存在，则隐藏表,php,mysql,search,Php,Mysql,Search,正是标题所说的。我想隐藏包含所有搜索查询的表，但我尝试了很多方法，但都不起作用。例如，如果（$myData！=null）{继续显示表}，但这不起作用isset（）也不起作用。有什么想法吗 <style> ul { list-style-type: none; } </style> <html> <head> <meta http-equiv="Content-Type"

正是标题所说的。我想隐藏包含所有搜索查询的表，但我尝试了很多方法，但都不起作用。例如，
如果（$myData！=null）{继续显示表}
，但这不起作用<代码>isset（）也不起作用。有什么想法吗

<style>
    ul
    {
        list-style-type: none;
    }

</style>


<html>
    <head>
        <meta  http-equiv="Content-Type" content="text/html;  charset=iso-8859-1">
        <title>Search Chemicals</title>
    </head>
    <p>
    <body>
        <h3>Chemical Information</h3>
        <p>You may search by Catalog number, CASRN, or the chemical name.</p>
        <form  method="post" action="search.php?go"  id="searchform">
            <input  type="text" name="name">
            <input  type="submit" name="submit" value="Search">
        </form>
        <?php
        error_reporting(0);

        if (isset($_POST['submit'])) {

            if (isset($_GET['go'])) {
                if (preg_match("/^[a-zA-Z0-9]+/", $_POST['name'])) {
                    $name   = $_POST['name'];
                    $conn   = mysql_connect("localhost", "Blimeo", "password");
                    $db     = mysql_connect("localhost", "-", "-") or die('I cannot connect to the database  because: ' . mysql_error());
                    //-select  the database to use
                    $mydb   = mysql_select_db("chemicals");
                    //-query  the database table
                    $sql    = "SELECT * FROM products WHERE Catalog LIKE '%" . $name . "%' OR CASRN LIKE '%" . $name . "%' OR Chemical_Name LIKE '%" . $name . "%'";
                    $myData = mysql_query($sql, $conn);
                    echo "<table border=1>
            <tr>
            <th>Catalog</th>
            <th>Image</th>
            <th>CASRN</th>
            <th>Chemical Name</th>
            <th>Quantity 1</th>
            <th>Price 1</th>
            <th>Quantity 2</th>
            <th>Price 2</th>
            <th>Quantity 3</th>
            <th>Price 3</th>
            <th>Quantity 4</th>
            <th>Price 4</th>
            </tr>";
                    while ($record = mysql_fetch_array($myData)) {

                        echo "<tr>";
                        echo "<td>" . $record['Catalog'] . "</td>";
                        echo "<td><img src=\"./img/" . $record['Image'] . "\" alt=\"Chemical\"/></td>";
                        echo "<td>" . $record['CASRN'] . "</td>";
                        echo "<td>" . $record['Chemical_Name'] . "</td>";
                        echo "<td>" . $record['Quantity1'] . "</td>";
                        echo "<td>" . $record['Price1'] . "</td>";
                        echo "<td>" . $record['Quantity2'] . "</td>";
                        echo "<td>" . $record['Price2'] . "</td>";
                        echo "<td>" . $record['Quantity3'] . "</td>";
                        echo "<td>" . $record['Price3'] . "</td>";
                        echo "<td>" . $record['Quantity4'] . "</td>";
                        echo "<td>" . $record['Price4'] . "</td>";
                        echo "</tr>";
                        echo "</form>";
                        echo "<ul>\n";
                        echo "<li>" . "<a  href=\"search.php?id=$ID\">" . $Catalog . " " . $CASRN . " " . $Chemical_Name . "</a></li>\n";
                        echo "</ul>";
                    }
                }
            } else {
                echo "<p>Product not found! Please rephrase your search criteria.</p>";
            }
        }
        ?>
    </body>
</html>
</p>


保险商实验室
{
列表样式类型：无；
}
搜索化学品

化学信息
您可以通过目录号、CASRN或化学名称进行搜索


<style>
    ul
    {
        list-style-type: none;
    }

</style>


<html>
    <head>
        <meta  http-equiv="Content-Type" content="text/html;  charset=iso-8859-1">
        <title>Search Chemicals</title>
    </head>
    <p>
    <body>
        <h3>Chemical Information</h3>
        <p>You may search by Catalog number, CASRN, or the chemical name.</p>
        <form  method="post" action="search.php?go"  id="searchform">
            <input  type="text" name="name">
            <input  type="submit" name="submit" value="Search">
        </form>
        <?php
        error_reporting(0);

        if (isset($_POST['submit'])) {

            if (isset($_GET['go'])) {
                if (preg_match("/^[a-zA-Z0-9]+/", $_POST['name'])) {
                    $name   = $_POST['name'];
                    $conn   = mysql_connect("localhost", "Blimeo", "password");
                    $db     = mysql_connect("localhost", "-", "-") or die('I cannot connect to the database  because: ' . mysql_error());
                    //-select  the database to use
                    $mydb   = mysql_select_db("chemicals");
                    //-query  the database table
                    $sql    = "SELECT * FROM products WHERE Catalog LIKE '%" . $name . "%' OR CASRN LIKE '%" . $name . "%' OR Chemical_Name LIKE '%" . $name . "%'";
                    $myData = mysql_query($sql, $conn);
                    echo "<table border=1>
            <tr>
            <th>Catalog</th>
            <th>Image</th>
            <th>CASRN</th>
            <th>Chemical Name</th>
            <th>Quantity 1</th>
            <th>Price 1</th>
            <th>Quantity 2</th>
            <th>Price 2</th>
            <th>Quantity 3</th>
            <th>Price 3</th>
            <th>Quantity 4</th>
            <th>Price 4</th>
            </tr>";
                    while ($record = mysql_fetch_array($myData)) {

                        echo "<tr>";
                        echo "<td>" . $record['Catalog'] . "</td>";
                        echo "<td><img src=\"./img/" . $record['Image'] . "\" alt=\"Chemical\"/></td>";
                        echo "<td>" . $record['CASRN'] . "</td>";
                        echo "<td>" . $record['Chemical_Name'] . "</td>";
                        echo "<td>" . $record['Quantity1'] . "</td>";
                        echo "<td>" . $record['Price1'] . "</td>";
                        echo "<td>" . $record['Quantity2'] . "</td>";
                        echo "<td>" . $record['Price2'] . "</td>";
                        echo "<td>" . $record['Quantity3'] . "</td>";
                        echo "<td>" . $record['Price3'] . "</td>";
                        echo "<td>" . $record['Quantity4'] . "</td>";
                        echo "<td>" . $record['Price4'] . "</td>";
                        echo "</tr>";
                        echo "</form>";
                        echo "<ul>\n";
                        echo "<li>" . "<a  href=\"search.php?id=$ID\">" . $Catalog . " " . $CASRN . " " . $Chemical_Name . "</a></li>\n";
                        echo "</ul>";
                    }
                }
            } else {
                echo "<p>Product not found! Please rephrase your search criteria.</p>";
            }
        }
        ?>
    </body>
</html>
</p>





<style>
    ul
    {
        list-style-type: none;
    }

</style>


<html>
    <head>
        <meta  http-equiv="Content-Type" content="text/html;  charset=iso-8859-1">
        <title>Search Chemicals</title>
    </head>
    <p>
    <body>
        <h3>Chemical Information</h3>
        <p>You may search by Catalog number, CASRN, or the chemical name.</p>
        <form  method="post" action="search.php?go"  id="searchform">
            <input  type="text" name="name">
            <input  type="submit" name="submit" value="Search">
        </form>
        <?php
        error_reporting(0);

        if (isset($_POST['submit'])) {

            if (isset($_GET['go'])) {
                if (preg_match("/^[a-zA-Z0-9]+/", $_POST['name'])) {
                    $name   = $_POST['name'];
                    $conn   = mysql_connect("localhost", "Blimeo", "password");
                    $db     = mysql_connect("localhost", "-", "-") or die('I cannot connect to the database  because: ' . mysql_error());
                    //-select  the database to use
                    $mydb   = mysql_select_db("chemicals");
                    //-query  the database table
                    $sql    = "SELECT * FROM products WHERE Catalog LIKE '%" . $name . "%' OR CASRN LIKE '%" . $name . "%' OR Chemical_Name LIKE '%" . $name . "%'";
                    $myData = mysql_query($sql, $conn);
                    echo "<table border=1>
            <tr>
            <th>Catalog</th>
            <th>Image</th>
            <th>CASRN</th>
            <th>Chemical Name</th>
            <th>Quantity 1</th>
            <th>Price 1</th>
            <th>Quantity 2</th>
            <th>Price 2</th>
            <th>Quantity 3</th>
            <th>Price 3</th>
            <th>Quantity 4</th>
            <th>Price 4</th>
            </tr>";
                    while ($record = mysql_fetch_array($myData)) {

                        echo "<tr>";
                        echo "<td>" . $record['Catalog'] . "</td>";
                        echo "<td><img src=\"./img/" . $record['Image'] . "\" alt=\"Chemical\"/></td>";
                        echo "<td>" . $record['CASRN'] . "</td>";
                        echo "<td>" . $record['Chemical_Name'] . "</td>";
                        echo "<td>" . $record['Quantity1'] . "</td>";
                        echo "<td>" . $record['Price1'] . "</td>";
                        echo "<td>" . $record['Quantity2'] . "</td>";
                        echo "<td>" . $record['Price2'] . "</td>";
                        echo "<td>" . $record['Quantity3'] . "</td>";
                        echo "<td>" . $record['Price3'] . "</td>";
                        echo "<td>" . $record['Quantity4'] . "</td>";
                        echo "<td>" . $record['Price4'] . "</td>";
                        echo "</tr>";
                        echo "</form>";
                        echo "<ul>\n";
                        echo "<li>" . "<a  href=\"search.php?id=$ID\">" . $Catalog . " " . $CASRN . " " . $Chemical_Name . "</a></li>\n";
                        echo "</ul>";
                    }
                }
            } else {
                echo "<p>Product not found! Please rephrase your search criteria.</p>";
            }
        }
        ?>
    </body>
</html>
</p>
您应该添加

<style>
    ul
    {
        list-style-type: none;
    }

</style>


<html>
    <head>
        <meta  http-equiv="Content-Type" content="text/html;  charset=iso-8859-1">
        <title>Search Chemicals</title>
    </head>
    <p>
    <body>
        <h3>Chemical Information</h3>
        <p>You may search by Catalog number, CASRN, or the chemical name.</p>
        <form  method="post" action="search.php?go"  id="searchform">
            <input  type="text" name="name">
            <input  type="submit" name="submit" value="Search">
        </form>
        <?php
        error_reporting(0);

        if (isset($_POST['submit'])) {

            if (isset($_GET['go'])) {
                if (preg_match("/^[a-zA-Z0-9]+/", $_POST['name'])) {
                    $name   = $_POST['name'];
                    $conn   = mysql_connect("localhost", "Blimeo", "password");
                    $db     = mysql_connect("localhost", "-", "-") or die('I cannot connect to the database  because: ' . mysql_error());
                    //-select  the database to use
                    $mydb   = mysql_select_db("chemicals");
                    //-query  the database table
                    $sql    = "SELECT * FROM products WHERE Catalog LIKE '%" . $name . "%' OR CASRN LIKE '%" . $name . "%' OR Chemical_Name LIKE '%" . $name . "%'";
                    $myData = mysql_query($sql, $conn);
                    echo "<table border=1>
            <tr>
            <th>Catalog</th>
            <th>Image</th>
            <th>CASRN</th>
            <th>Chemical Name</th>
            <th>Quantity 1</th>
            <th>Price 1</th>
            <th>Quantity 2</th>
            <th>Price 2</th>
            <th>Quantity 3</th>
            <th>Price 3</th>
            <th>Quantity 4</th>
            <th>Price 4</th>
            </tr>";
                    while ($record = mysql_fetch_array($myData)) {

                        echo "<tr>";
                        echo "<td>" . $record['Catalog'] . "</td>";
                        echo "<td><img src=\"./img/" . $record['Image'] . "\" alt=\"Chemical\"/></td>";
                        echo "<td>" . $record['CASRN'] . "</td>";
                        echo "<td>" . $record['Chemical_Name'] . "</td>";
                        echo "<td>" . $record['Quantity1'] . "</td>";
                        echo "<td>" . $record['Price1'] . "</td>";
                        echo "<td>" . $record['Quantity2'] . "</td>";
                        echo "<td>" . $record['Price2'] . "</td>";
                        echo "<td>" . $record['Quantity3'] . "</td>";
                        echo "<td>" . $record['Price3'] . "</td>";
                        echo "<td>" . $record['Quantity4'] . "</td>";
                        echo "<td>" . $record['Price4'] . "</td>";
                        echo "</tr>";
                        echo "</form>";
                        echo "<ul>\n";
                        echo "<li>" . "<a  href=\"search.php?id=$ID\">" . $Catalog . " " . $CASRN . " " . $Chemical_Name . "</a></li>\n";
                        echo "</ul>";
                    }
                }
            } else {
                echo "<p>Product not found! Please rephrase your search criteria.</p>";
            }
        }
        ?>
    </body>
</html>
</p>

$myData=mysql\u查询（$sql，$conn）；
$exists=mysql\u num\u行（$myData）；
如果（$存在）{
回声“；
//..................
回声“；
}否则{
echo“未找到产品！请重新表述您的搜索条件。
”；

<style>
    ul
    {
        list-style-type: none;
    }

</style>


<html>
    <head>
        <meta  http-equiv="Content-Type" content="text/html;  charset=iso-8859-1">
        <title>Search Chemicals</title>
    </head>
    <p>
    <body>
        <h3>Chemical Information</h3>
        <p>You may search by Catalog number, CASRN, or the chemical name.</p>
        <form  method="post" action="search.php?go"  id="searchform">
            <input  type="text" name="name">
            <input  type="submit" name="submit" value="Search">
        </form>
        <?php
        error_reporting(0);

        if (isset($_POST['submit'])) {

            if (isset($_GET['go'])) {
                if (preg_match("/^[a-zA-Z0-9]+/", $_POST['name'])) {
                    $name   = $_POST['name'];
                    $conn   = mysql_connect("localhost", "Blimeo", "password");
                    $db     = mysql_connect("localhost", "-", "-") or die('I cannot connect to the database  because: ' . mysql_error());
                    //-select  the database to use
                    $mydb   = mysql_select_db("chemicals");
                    //-query  the database table
                    $sql    = "SELECT * FROM products WHERE Catalog LIKE '%" . $name . "%' OR CASRN LIKE '%" . $name . "%' OR Chemical_Name LIKE '%" . $name . "%'";
                    $myData = mysql_query($sql, $conn);
                    echo "<table border=1>
            <tr>
            <th>Catalog</th>
            <th>Image</th>
            <th>CASRN</th>
            <th>Chemical Name</th>
            <th>Quantity 1</th>
            <th>Price 1</th>
            <th>Quantity 2</th>
            <th>Price 2</th>
            <th>Quantity 3</th>
            <th>Price 3</th>
            <th>Quantity 4</th>
            <th>Price 4</th>
            </tr>";
                    while ($record = mysql_fetch_array($myData)) {

                        echo "<tr>";
                        echo "<td>" . $record['Catalog'] . "</td>";
                        echo "<td><img src=\"./img/" . $record['Image'] . "\" alt=\"Chemical\"/></td>";
                        echo "<td>" . $record['CASRN'] . "</td>";
                        echo "<td>" . $record['Chemical_Name'] . "</td>";
                        echo "<td>" . $record['Quantity1'] . "</td>";
                        echo "<td>" . $record['Price1'] . "</td>";
                        echo "<td>" . $record['Quantity2'] . "</td>";
                        echo "<td>" . $record['Price2'] . "</td>";
                        echo "<td>" . $record['Quantity3'] . "</td>";
                        echo "<td>" . $record['Price3'] . "</td>";
                        echo "<td>" . $record['Quantity4'] . "</td>";
                        echo "<td>" . $record['Price4'] . "</td>";
                        echo "</tr>";
                        echo "</form>";
                        echo "<ul>\n";
                        echo "<li>" . "<a  href=\"search.php?id=$ID\">" . $Catalog . " " . $CASRN . " " . $Chemical_Name . "</a></li>\n";
                        echo "</ul>";
                    }
                }
            } else {
                echo "<p>Product not found! Please rephrase your search criteria.</p>";
            }
        }
        ?>
    </body>
</html>
</p>


}
不管搜索查询的结果如何，您似乎都在回显您的表。您可能应该检查结果集中返回的行数，只有当计数大于0时才回显表。

使用
隐藏表，并使用Javascript根据搜索查询或其他条件更改可见性。

这可能无助于回答您的问题，但是您应该停止使用
mysql.*
函数。他们被弃用了。改为使用（从PHP5.1开始支持）或（从PHP4.1开始支持）。如果您不确定使用哪一个，请尝试
mysql\u num\u rows（）
。如果大于0，则显示表格
mysqli
和
PDO
都有类似的功能。 
<style>
    ul
    {
        list-style-type: none;
    }

</style>


<html>
    <head>
        <meta  http-equiv="Content-Type" content="text/html;  charset=iso-8859-1">
        <title>Search Chemicals</title>
    </head>
    <p>
    <body>
        <h3>Chemical Information</h3>
        <p>You may search by Catalog number, CASRN, or the chemical name.</p>
        <form  method="post" action="search.php?go"  id="searchform">
            <input  type="text" name="name">
            <input  type="submit" name="submit" value="Search">
        </form>
        <?php
        error_reporting(0);

        if (isset($_POST['submit'])) {

            if (isset($_GET['go'])) {
                if (preg_match("/^[a-zA-Z0-9]+/", $_POST['name'])) {
                    $name   = $_POST['name'];
                    $conn   = mysql_connect("localhost", "Blimeo", "password");
                    $db     = mysql_connect("localhost", "-", "-") or die('I cannot connect to the database  because: ' . mysql_error());
                    //-select  the database to use
                    $mydb   = mysql_select_db("chemicals");
                    //-query  the database table
                    $sql    = "SELECT * FROM products WHERE Catalog LIKE '%" . $name . "%' OR CASRN LIKE '%" . $name . "%' OR Chemical_Name LIKE '%" . $name . "%'";
                    $myData = mysql_query($sql, $conn);
                    echo "<table border=1>
            <tr>
            <th>Catalog</th>
            <th>Image</th>
            <th>CASRN</th>
            <th>Chemical Name</th>
            <th>Quantity 1</th>
            <th>Price 1</th>
            <th>Quantity 2</th>
            <th>Price 2</th>
            <th>Quantity 3</th>
            <th>Price 3</th>
            <th>Quantity 4</th>
            <th>Price 4</th>
            </tr>";
                    while ($record = mysql_fetch_array($myData)) {

                        echo "<tr>";
                        echo "<td>" . $record['Catalog'] . "</td>";
                        echo "<td><img src=\"./img/" . $record['Image'] . "\" alt=\"Chemical\"/></td>";
                        echo "<td>" . $record['CASRN'] . "</td>";
                        echo "<td>" . $record['Chemical_Name'] . "</td>";
                        echo "<td>" . $record['Quantity1'] . "</td>";
                        echo "<td>" . $record['Price1'] . "</td>";
                        echo "<td>" . $record['Quantity2'] . "</td>";
                        echo "<td>" . $record['Price2'] . "</td>";
                        echo "<td>" . $record['Quantity3'] . "</td>";
                        echo "<td>" . $record['Price3'] . "</td>";
                        echo "<td>" . $record['Quantity4'] . "</td>";
                        echo "<td>" . $record['Price4'] . "</td>";
                        echo "</tr>";
                        echo "</form>";
                        echo "<ul>\n";
                        echo "<li>" . "<a  href=\"search.php?id=$ID\">" . $Catalog . " " . $CASRN . " " . $Chemical_Name . "</a></li>\n";
                        echo "</ul>";
                    }
                }
            } else {
                echo "<p>Product not found! Please rephrase your search criteria.</p>";
            }
        }
        ?>
    </body>
</html>
</p>