[php-src] Issue #8182: The current() method of SplFileObject has a very low probability of not returning complete data

Issue: https://github.com/php/php-src/issues/8182 Author: hisune ### Description I wrote a composer package that synchronizes log content to clickhouse in real time. After verification of the online log, I found that there is a very low probability that the current() method cannot return complete data.The code is in this file: https://github.com/hisune/log2ck/blob/94ca81f600c1fef5919fc58ffd737ccd15dc7654/src/Worker.php#L73 The following code: ```php <?php $file = new SplFileObject($this->path); $file->seek($this->getCurrentLines()); while($this->onProcess){ $line = $file->current(); if($file->eof()){ sleep(1); $file->fseek(0, SEEK_CUR); continue; } $file->next(); $line = rtrim($line, PHP_EOL); } ``` The data obtained by the $line variable may be incomplete. For example, the content of a line is 1111111111222222222222, and the content it obtains may be 222222222222, that is, the previous content of this line is lost. According to the statistical results of online log collection, there will be problems with about 5 lines of data in 10 million lines. ### PHP Version 7.3.28 ### Operating System CentOS release 7.6.1810