05-13-2008
Quote:
Originally Posted by
frozentin
By looking at your 2 examples, why don't you;
[1] loop thru the contents of the 2nd file
[2] compare every individual line of the 2nd file with all the lines in the first
[3] print matched lines to file3
[4] After looping thru all the entries in file2, do a diff between file1 and file_matched
[5] parse the o/p of [4] to file4
Disclaimer: I couldn't script if my life depended on it, so can't really help you with that.
Thanks Frozentin but the issue here is that one of the file (file1 in this case ) has huge no of records and looping and comparing is taking a lot of time.
Is there any alternative way to do this with good performance.
Please advise.
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LEARN ABOUT PHP
strnatcasecmp
STRNATCASECMP(3) 1 STRNATCASECMP(3)
strnatcasecmp - Case insensitive string comparisons using a "natural order" algorithm
SYNOPSIS
int strnatcasecmp (string $str1, string $str2)
DESCRIPTION
This function implements a comparison algorithm that orders alphanumeric strings in the way a human being would. The behaviour of this
function is similar to strnatcmp(3), except that the comparison is not case sensitive. For more information see: Martin Pool's Natural
Order String Comparison page.
PARAMETERS
o $str1
- The first string.
o $str2
- The second string.
RETURN VALUES
Similar to other string comparison functions, this one returns < 0 if $str1 is less than $str2 > 0 if $str1 is greater than $str2, and 0
if they are equal.
SEE ALSO
preg_match(3), strcmp(3), strcasecmp(3), substr(3), stristr(3), strncasecmp(3), strncmp(3), strstr(3), setlocale(3).
PHP Documentation Group STRNATCASECMP(3)