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Full Discussion: How to compare two strings
Top Forums Shell Programming and Scripting How to compare two strings Post 302227001 by otheus on Wednesday 20th of August 2008 11:13:16 AM
Old 08-20-2008
Quote:
Originally Posted by Niroj
SmilieThat is good but I used the way how Prashant tried.. so tht he can find wht is the prob in his string comp approach..
The problem is that he's comparing a string using the shell's NUMERICAL comparators (lt, ge, etc). He could use bash's STRING comparators. The weird thing is that they have to be escaped, so I avoid them.

Code:
$ test "0.1.2" \< "0.1.3" && echo smaller
smaller

Again, that only works in BASH (at least since version 2.05 // 2005).
 

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ADDCSLASHES(3)								 1							    ADDCSLASHES(3)

addcslashes - Quote string with slashes in a C style

SYNOPSIS
string addcslashes (string $str, string $charlist) DESCRIPTION
Returns a string with backslashes before characters that are listed in $charlist parameter. PARAMETERS
o $str - The string to be escaped. o $charlist - A list of characters to be escaped. If $charlist contains characters , etc., they are converted in C-like style, while other non-alphanumeric characters with ASCII codes lower than 32 and higher than 126 converted to octal representation. When you define a sequence of characters in the charlist argument make sure that you know what characters come between the characters that you set as the start and end of the range. <?php echo addcslashes('foo[ ]', 'A..z'); // output: foo[ ] // All upper and lower-case letters will be escaped // ... but so will the []^_` ?> <?php echo addcslashes("zoo['.']", 'z..A'); // output: zoo['.'] ?> RETURN VALUES
Returns the escaped string. CHANGELOG
+--------+---------------------------------------------+ |Version | | | | | | | Description | | | | +--------+---------------------------------------------+ | 5.2.5 | | | | | | | The escape sequences v and f were added. | | | | +--------+---------------------------------------------+ EXAMPLES
$charlist like "..37", which would escape all characters with ASCII code between 0 and 31. Example #1 addcslashes(3) example <?php $escaped = addcslashes($not_escaped, "..37!@177..377"); ?> SEE ALSO
stripcslashes(3), stripslashes(3), addslashes(3), htmlspecialchars(3), quotemeta(3). PHP Documentation Group ADDCSLASHES(3)
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