在txt文件中搜索，总和+1并写入文件

Question

Good day guys,

I am really nowhere to the guy who do PHP coding, so I am asking you.

I have file in txt format and in that file somewhere I am having line with "count: (n)", where "(n)" can be any numeric value.

I need to search for count: (n), take the (n) value, sum it with +1 and save the file again.

So if I will have count: 10 it must be 10 + 1 = 11.

Thank you!

Answer 1

You'll probably want to use some regex to parse the 'count: n' string from the file. Although my regex is kind of rusty, this pattern might help:

$file = fopen('text.txt', 'r+'); // Open the file for reading and writing into the variable $file.
$fileContents = file_get_contents($file); // Load the contents of the file to variable $fileContents.

$countString = preg_match('/count: [0-9]+/', $fileContents); // Find instances of string 'count: n' where n is an integer, load the string into $countString.
$count = preg_match('/[0-9]+/', $countString); // Find the integer from $countString, load into $count.
$count++; // Iterate count up one.

$newCountString = 'count: '.$count; // The 'count: n+1' string where n is the original integer.

$newFileContents = preg_replace('/count: [0-9]+/', $newCountString, $fileContents); // Find the string 'count: n' and replace with 'count: n+1' where n is the original integer.
fwrite($file, $newFileContents); // Write the new contents into the file.
fclose($file);

Good luck!