php 从 STDIN 逐行读取
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Reading line by line from STDIN
提问by sobi3ch
I want to do something like this:
我想做这样的事情：
$ [mysql query that produces many lines] | php parse_STDIN.php
In parse_STDIN.phpfile I want to be able to parse my data line by line from stdin.
在parse_STDIN.php文件中，我希望能够从标准输入逐行解析我的数据。
回答by Shiplu Mokaddim
use STDINconstant as file handler.
使用STDIN常量作为文件处理程序。
while($f = fgets(STDIN)){
echo "line: $f";
}
Note: fgets on STDIN reads the \ncharacter.
注意：STDIN 上的 fgets 读取\n字符。
回答by Luis Colón
You could also use a generator - if you don't know how large the STDIN is going to be.
您也可以使用生成器 - 如果您不知道 STDIN 有多大。
Requires PHP 5 >= 5.5.0, PHP 7
需要 PHP 5 >= 5.5.0，PHP 7
Something along the lines of:
类似的东西：
function stdin_stream()
{
while ($line = fgets(STDIN)) {
yield $line;
}
}
foreach (stdin_stream() as $line) {
// do something with the contents coming in from STDIN
}
You can read more about generators here (or a google search for tutorials): http://php.net/manual/en/language.generators.overview.php
您可以在此处阅读有关生成器的更多信息（或谷歌搜索教程）：http: //php.net/manual/en/language.generators.overview.php
