The PHP 5 command-line version now allows individual line processing, similar to Perl and awk.
Use these flags on the command line to alter PHP’s behavior:
Run this code before processing the file. This
is similar to
Run this code on each line of the file.
Run this code at the end of processing the file.
This is similar to
The contents of the current line are
$argn. This simple example prints
each line of example.txt:
$ php -R 'print "$argn\n" ;' < example.txt
The current line number is stored in
$argi. The first line of the file is line 1 (not
0). So, to print out select lines of a file, do this:
$ php -B '$start = 2; $stop = 4;' -R 'if ($argi >= $start && $argi <= $stop) print "$argn\n";' < example.txt
Modifying standard input disrupts the flow. For instance:
$ php -R 'print fgets(STDIN);' < example.txt
-R flag causes PHP to read in one line
from standard input. Therefore, when you call
fgets( ), you read in a second line. This
results in “missing” lines because
both PHP and you are processing the file.