如何使用php从传递给url中的html页面的参数创建文本文件？

I need my page bargraph.html to get parameters like .../bargraph.html?di=xxxx&mn=yyyy and save the values of di and mn using a php script in a text file named cred.txt. The code I'm using for bargraph.html is

<body>
    <?php
       $mobile_num = $_GET["mn"];
       $device_id = $_GET["di"];
       $file_name = "cred.txt";
       $location = "cred/".$file_name;
       $text = $mobile_num."
".$mobile_num;
       $my_file = fopen($location, "w") or die("Unable to open file!");
       fwrite($my_file, $text);
       echo "response submitted successfully!";
       fclose($my_file);
    ?>
</body>

The file named cred.txt is not created inside the cred/ directory and neither I get any errors. What am I doing wrong?

If the same thing can be done using JavaScript I'll use that instead of php for this purpose.

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2条回答默认最新

douzhu3367 2017-08-14 06:16

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The question references bargraph.html - presumably the php code that you have is NOT on that page but a separate script? If that is the case then if you were to use exception handling to try to track down the issue it might help. Also, I have always found better success when using full paths as opposed to relative ones

<?php
    if( isset( $_GET['mn'], $_GET['di'] ) ){
        try{
            $filename='cred.txt';

            $mobile_num=filter_input( INPUT_GET, 'mn', FILTER_SANITIZE_STRING );
            $device_id=filter_input( INPUT_GET, 'di', FILTER_SANITIZE_STRING );
            /*
                I have always found it is best to use a full path rather than relative
                Change `path/to/` to the appropriate path
            */
            $path=$_SERVER['DOCUMENT_ROOT'] . '/path/to/cred';

            /* If the path does not exist, warn user */
            if( !realpath( $path ) ){
                throw new Exception( sprintf( 'Unable to find path: %s', $path ) );
            }

            /* Can the chosen directory be read? */
            if( is_readable( $path ) && is_writable( $path ) ){

                $file=$path . '/' . $filename;
                #$text=$mobile_num . PHP_EOL . $mobile_num . PHP_EOL;

                /* I think this is probably what you intended? */
                $text=$device_id . PHP_EOL . $mobile_num . PHP_EOL;

                $status=file_put_contents( $file, $text, FILE_APPEND | FILE_TEXT );
                throw new Exception( $status ? sprintf('All good! Saved %s',$file) : sprintf('Error - unable to save %s',$file) );

            } else {
                /*
                    should set permissions if reading/writing of target folder failed
                    chmod($path,0777); etc
                */
                throw new Exception( sprintf( 'The path %s is either not readable or writable',$path ));
            }
        }catch( Exception $e ){
            exit( $e->getMessage() );
        }
    }
?>

Using a plain HTML page you could send an ajax request to the above PHP script ( in code below called bargraph.php )

<html>
    <head>
        <title>ajax-store credentials</title>

    </head>
    <body>
        <form id='bg'>
            <input type='text' name='mn' id='mn' placeholder='Mobile number: eg 0141 353 3874' />
            <input type='text' name='di' id='di' placeholder='Device ID: eg yellow banana' />
            <input type='button' id='bttn' value='Go' />
        </form>
        <script>
            document.getElementById('bttn').onclick=function(e){

                var mn=document.getElementById('mn').value;
                var di=document.getElementById('di').value;
                if( mn != '' && di != '' ){
                    var xhr=new XMLHttpRequest();
                    xhr.onload=function(r){
                        document.getElementById('status').innerHTML=this.response;
                    };
                    xhr.onerror=function(r){
                        document.getElementById('status').innerHTML=err.message;
                    };
                    xhr.open('GET','?mn='+mn+'&di='+di,true);
                    xhr.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
                    xhr.send();
                }
            }
        </script>
        <div id='status'></div>
    </body>
</html>

本回答被题主选为最佳回答 , 对您是否有帮助呢?