LoadModule php7_module D:/wamp/php/php7apache2_4.dll 
Include conf/extra/httpd-fcgid.conf
PHPIniDir "D:/wamp/php/"

<IfModule dir_module>
    DirectoryIndex index.php index.html default.html index.hml
</IfModule>

<IfModule mime_module>
    AddType application/x-httpd-php .php
</IfModule>

<FilesMatch "\.php$">
    SetHandler application/x-httpd-php
</FilesMatch>

<FilesMatch "\.phps$">
    SetHandler application/x-httpd-php-source
</FilesMatch>

extension_dir = "D:/wamp/php/ext"
extension=php_mbstring.dll
extension=php_mysqli.dll
extension=php_pdo_mysql.dll 
short_open_tag = On
date.timezone=PRC

<?php
// phpinfo();
$link=mysqli_connect('localhost:3306','root','cruces') or die('error');
var_dump($link);
?>1

<?php
    $link=mysqli_connect('localhost','root','cruces','abate');
    $sql='select * from `student`';
    $result=mysqli_query($link,$sql);
    $data=mysqli_fetch_all($result,MYSQLI_ASSOC);
    // var_dump($data);
    echo json_encode($data);
    
?>

<?php
    $arr=['aa'=>'aaa','bb'=>'bbb'];
    // print_r($arr);
    $jsonStr=json_encode($arr);
    echo '<br/>';
    echo $jsonStr;
    $string=json_decode($jsonStr);
    echo '<br/>';
    print_r($string);
?>