php字符串替换不起作用

Question

我想替换sql文件中的一些字符串。我已经编写了一个应该这样做的PHP脚本。但是，在我添加了while循环槽这个大文件（1.2GB）之后，替换功能不再适用了。

$reading = fopen('m.sql', 'r');
$writing = fopen('m.tmp', 'w');

$search = array("ä",
    "Ä",
    "ö",
    "Ö",
    "ü",
    "Ü",
    "€",
    "§",
    "ß",
    "latin1_general_ci",
    "CHARSET=latin1",
    "‚",
    "„",
    "‘",
    "’",
    "“",
    "â€",
    "©",
    "®");

$replace = array("ä",
    "Ä",
    "ö",
    "Ö",
    "ü",
    "Ü",
    "€",
    "§",
    "ß",
    "utf8_general_ci",
    "CHARSET=utf8",
    "‚",
    "„",
    "‘",
    "’",
    "“",
    "”",
    "©",
    "®");

if ($reading) {
    // read one line or 4096 bytes, whichever comes first
    while (($dateiinhalt = fgets($reading, 4096)) !== false) {
        // replace in that and write to output file
        fwrite($writing, str_replace($search, $replace, $dateiinhalt));
    }
    if (!feof($reading)) { // fgets() failed, but not at end of file
        echo "Error: unexpected fgets() fail\n";
    }
    fclose($reading);
    fclose($writing);
}

echo "done";

可能是什么问题？

Answer 1

解决方案是将php版本从5.5更改为7