PHP长时间运行的内存溢出。

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Release: 2016-06-06 20:10:49
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循环一个文件夹下的 txt 文件,将其中数据按行读取存进数据库 出现 Fatal error: Allowed memory size of 134217728 bytes exhausted 的错误提示,

代码如下,我每一个 txt 文件都不大(100k左右),而且是按行进行读取的,原因在哪呢?

<code>        $file = new \FilesystemIterator($fileName);
        foreach ($file as $fileinfo) {

            if ( $fileinfo->isFile() ) {
                $fp = fopen($fileName . '/' . $fileinfo->getFilename(), 'r');
                while(! feof($fp)) {
                    $data['score'] = 7;
                    $data['code'] = fgets($fp);
                    $this->book->add($data);//存进数据库
                }

                fclose($fp);
            }

        }</code>
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回复内容:

循环一个文件夹下的 txt 文件,将其中数据按行读取存进数据库 出现 Fatal error: Allowed memory size of 134217728 bytes exhausted 的错误提示,

代码如下,我每一个 txt 文件都不大(100k左右),而且是按行进行读取的,原因在哪呢?

<code>        $file = new \FilesystemIterator($fileName);
        foreach ($file as $fileinfo) {

            if ( $fileinfo->isFile() ) {
                $fp = fopen($fileName . '/' . $fileinfo->getFilename(), 'r');
                while(! feof($fp)) {
                    $data['score'] = 7;
                    $data['code'] = fgets($fp);
                    $this->book->add($data);//存进数据库
                }

                fclose($fp);
            }

        }</code>
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用关键字yield 进行迭代操作,不会储存中间变量节省内存,要求php5.5+

$this->book->add($data);
unset($data);

while循环时$data会发生写时复制(COW),这些内存只有在你的脚本执行结束后才会释放

安装xdebug或者xhprof查看性能分析报告。

我估计是框架的配置,sql做了收集

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