如何从一个文本文件到另一个文本文件逐行提取字符串

Question

I have a text file of phone numbers like below:

[phone] [phone] [phone] [phone] [phone] [phone] [phone].

I want to extract each number, strip +234 from it and replace with 0 , then add the following text "Names" . "\t" in front of the modified number.

Then I want to insert this new string in a new text file (line-by-line).. This is what I get in the new_textFile with the code I've wrote:

Names 00urce id #3

Names 00urce id #3

Here's my code:

$this_crap_file = fopen($old_file_name, "r");
$total_number_lines_for_this_crap_file = count($this_crap_file);
while(!feof($this_crap_file))
{
  $the_new_writing = fopen($new_file_name, "a");
  $the_string = substr_replace($this_crap_file, "0", 0, 4);
  $new_string = "Names" . "\t" . 0 . $the_string . "
";
  fwrite($the_new_writing, $new_string);
}
fclose($this_crap_file);

Answer 1

No space between fopen and the parenthesis? Sorry, I don't see the relevance of that statement.

Assuming your input file only has one phone number per line, and that they all start with '+234', you could use a regular expression to pick out just the part you want to put in the new file, like this:

$this_crap_file = fopen($old_file_name, "r");
$the_new_writing = fopen($new_file_name, "a");

while ($line = fgets($this_crap_file))
{
  preg_match('/\+234(\d+)/', $line, $matches);
  $new_string = "Names\t" . $matches[1] . "
";
  fwrite($the_new_writing, $new_string);
}

fclose($the_new_writing);
fclose($this_crap_file);