ksh String Manipulation - removing variables from within a variable Post: 303029831

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Top Forums Shell Programming and Scripting ksh String Manipulation - removing variables from within a variable Post 303029831 by RudiC on Friday 1st of February 2019 11:51:33 AM

02-01-2019

Registered User

Quote:

Originally Posted by bakunin

...
/Addendum: only now i recognised a rather careless typo in my example above, which i have now corrected: instead of the correct ${NAMES/${EXCLUDE_NAME}/} (replace ${EXCLUDE_NAME} with nothing) i used ${NAMES//${EXCLUDE_NAME}} (replace nothing with ${EXCLUDE_NAME} ??), which is fo course wrong. You may want to try again with Solaris as, alas, my trusted old U05 seems not to work any more.
...

I'm happy (or should I be sorry?) to be able to correct your humble self-correction: the original expression was NOT wrong but corresponds to the second form quoted below. man ksh:

Quote:

${parameter/pattern/string}
${parameter//pattern/string}
${parameter/#pattern/string}
${parameter/%pattern/string}
Expands parameter and replaces the longest match of pattern with the specified string. Each occurrence of \n in string is replaced by the portion of parameter that matches the nth sub-pattern.
...
In the first form, only the first occurrence of pattern is replaced.
In the second form, each match for pattern is replaced by the specified string.

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LEARN ABOUT PHP

mb_eregi_replace

MB_EREGI_REPLACE(3)							 1						       MB_EREGI_REPLACE(3)

mb_eregi_replace - Replace regular expression with multibyte support ignoring case

SYNOPSIS

       string mb_eregi_replace (string	$pattern, string  $replace, string  $string, [string  $option = "msri"])

DESCRIPTION

	Scans $string for matches to $pattern, then replaces the matched text with $replacement.

PARAMETERS

	      o $pattern
		- The regular expression pattern. Multibyte characters may be used. The case will be ignored.

	      o $replace
		- The replacement text.

	      o $string
		- The searched string.

	      o $option
		-$option has the same meaning as in mb_ereg_replace(3).

RETURN VALUES

	The resultant string or FALSE on error.

NOTES

       Note

	      The  internal  encoding  or the character encoding specified by mb_regex_encoding(3) will be used as the character encoding for this
	      function.

       Warning

	      Never use the e modifier when working on untrusted input. No automatic escaping will happen (as  known  from  preg_replace(3)).  Not
	      taking care of this will most likely create remote code execution vulnerabilities in your application.

SEE ALSO

       mb_regex_encoding(3), mb_ereg_replace(3).

PHP Documentation Group 												       MB_EREGI_REPLACE(3)

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