fwrite不写入

Question

 $fp = fopen('log.txt', 'w');
 fwrite($fp, 'Missing gallery image for: ' . $row['toolbar_id'] . '\n');

上面的代码没有写入文件。$row['toolbar_id']是来自for each循环的值。有什么建议吗？没有PHP错误，因为文件确实会在我调试该部分时打开。

Answer 1

试试这个额外的保证

ini_set('display_errors', 'On');
error_reporting(E_ALL);

$fp = fopen('log.txt', 'ab');
if (false === $fp) {
    throw new RuntimeException('Unable to open log file for writing');
}

$bytes = fwrite($fp, 'Missing gallery image for: ' . $row['toolbar_id'] . PHP_EOL);
printf('Wrote %d bytes to %s', $bytes, realpath('log.txt'));
fclose($fp);

编辑:将"write“标志(w)改为"append”(a)，因为截断日志文件听起来不是个好主意

Answer 2

https://bugs.php.net/bug.php?id=48607 fwrite和ftp有一个php bug，这意味着当fwrite之后直接调用fclose时，文件的最后一块有时不会被写入，在fclose修复这个问题之前，或者在你的情况下，在fclose之前登录到一个文件也可以停止它。

张贴以供将来参考！

Answer 3

 <?php
    $filename = 'log.txt';
    $somecontent = "Missing gallery image for: ";
    if($row['toolbar_id'] != "") 
    { 
        $somecontent .= $row['toolbar_id'];
    }

   if (is_writable($filename)) {


        if (!$handle = fopen($filename, 'a')) {
             echo "Cannot open file ($filename)";
             exit;
        }


        if (fwrite($handle, $somecontent) === FALSE) {
            echo "Cannot write to file ($filename)";
            exit;
        }

        echo "Success, wrote ($somecontent) to file ($filename)";

        fclose($handle);

    } else {
        echo "The file $filename is not writable";
    }
    ?>

试试这段代码。!！