在PHP数组中搜索以特定单词开头的值

Question

I am loading a text file into an array:

<?php

$filename = "data.txt";

$array = file($filename, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);

?>

The file contains certain lines, that start with the word "Data". Those lines are loaded as separate values in the array.

What I wanna do is extract only those values from the array and save those as a separate file, each one on a new line.

How would I go about searching for those specific values in the array and doing the above?

Answer 1

When you have lines of your file in an array, you are stuck with iterating through the array (lines) and checking whether the line starts with Data (0 === mb_strpos($line, 'Data')). If so, you just save the line to another file with fwrite().

Or you could run grep in console:

grep '^Data' input.txt > output.txt