02-13-2012
Bash - get specific character from the string
Hi!
If I want to extract a character from a specific position of a string, I can use ${string:1:1} (if I want character at the position 1). How can I do the same thing, when the number of position is contained in the variable? ${string:$var:1}doesn't work, unfortunately.
Thanks in advance.
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LEARN ABOUT PHP
mb_strrpos
MB_STRRPOS(3) 1 MB_STRRPOS(3)
mb_strrpos - Find position of last occurrence of a string in a string
SYNOPSIS
int mb_strrpos (string $haystack, string $needle, [int $offset], [string $encoding = mb_internal_encoding()])
DESCRIPTION
Performs a multibyte safe strrpos(3) operation based on the number of characters. $needle position is counted from the beginning of
$haystack. First character's position is 0. Second character position is 1.
PARAMETERS
o $haystack
- The string being checked, for the last occurrence of $needle
o $needle
- The string to find in $haystack.
o $offset
- May be specified to begin searching an arbitrary number of characters into the string. Negative values will stop searching at an
arbitrary point prior to the end of the string.
o $encoding
-The $encoding parameter is the character encoding. If it is omitted, the internal character encoding value will be used.
RETURN VALUES
Returns the numeric position of the last occurrence of $needle in the $haystack string. If $needle is not found, it returns FALSE.
CHANGELOG
+--------+---------------------------------------+
|Version | |
| | |
| | Description |
| | |
+--------+---------------------------------------+
| 5.2.0 | |
| | |
| | Added the optional parameter $offset. |
| | |
+--------+---------------------------------------+
NOTES
Note
The $encoding parameter was moved from the third position to the fourth in PHP 5.2.0. For backward compatibility, $encoding can be
specified as the third parameter, but doing so is deprecated and will be removed in the future.
SEE ALSO
mb_strpos(3), mb_internal_encoding(3), strrpos(3).
PHP Documentation Group MB_STRRPOS(3)