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浅析php中如何在有限的内存中读取大文件_PHP

WBOY
Release: 2016-06-01 12:05:32
Original
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正常情况下,我们可以使用fseek来读取,好处就是不会一次性读取,以下代码只适合边取边处理的情况,不适合一次性读取一次性处理。
可以用以下办法生成测试文件
复制代码 代码如下:
$file_handle = fopen("./csdn.txt", "rb+");
for ($index1 = 1; $index1     fwrite($file_handle, 'http://bitsCN.com'.$index1."\r");
}
fclose($file_handle);

读取处理代码如下:
复制代码 代码如下:
$i = 0;
$now = '';
while ($i >= 0) {
    if ($i>10) {
        break;
    }
    fseek($file_handle, 0, SEEK_CUR);
    $now = fgetc($file_handle);//可以自己写个判断false表示文件到头
    if ($now == "\r") {
        echo '找到断点';
    }
    echo $now;
    $i++;
}
fclose($file_handle);

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