Update a configuration file: Difference between revisions

=={{header|PHP}}==

<lang PHP><?php

$conf = file_get_contents('update-conf-file.txt');

// Disable the needspeeling option (using a semicolon prefix)

$conf = preg_replace('/^(needspeeling)(|\s*\S*)$/mi', '; $1', $conf);

// Enable the seedsremoved option by removing the semicolon and any leading whitespace

$conf = preg_replace('/^;?\s*(seedsremoved)/mi', '$1', $conf);

// Change the numberofbananas parameter to 1024

$conf = preg_replace('/^(numberofbananas)(|\s*\S*)$/mi', '$1 1024', $conf);

// Enable (or create if it does not exist in the file) a parameter for numberofstrawberries with a value of 62000

if (preg_match('/^;?\s*(numberofstrawberries)/mi', $conf, $matches)) {

$conf = preg_replace('/^(numberofstrawberries)(|\s*\S*)$/mi', '$1 62000', $conf);

} else {

$conf .= 'NUMBEROFSTRAWBERRIES 62000' . PHP_EOL;

}

echo $conf;</lang>

{{in}}

<pre># This is a configuration file in standard configuration file format

#

# Lines begininning with a hash or a semicolon are ignored by the application

# program. Blank lines are also ignored by the application program.

# The first word on each non comment line is the configuration option.

# Remaining words or numbers on the line are configuration parameter

# data fields.

# Note that configuration option names are not case sensitive. However,

# configuration parameter data is case sensitive and the lettercase must

# be preserved.

# This is a favourite fruit

FAVOURITEFRUIT banana

# This is a boolean that should be set

NEEDSPEELING

# This boolean is commented out

; SEEDSREMOVED

# How many bananas we have

NUMBEROFBANANAS 48</pre>

{{out}}

<pre># This is a configuration file in standard configuration file format

#

# Lines begininning with a hash or a semicolon are ignored by the application

# program. Blank lines are also ignored by the application program.

# The first word on each non comment line is the configuration option.

# Remaining words or numbers on the line are configuration parameter

# data fields.

# Note that configuration option names are not case sensitive. However,

# configuration parameter data is case sensitive and the lettercase must

# be preserved.

# This is a favourite fruit

FAVOURITEFRUIT banana

# This is a boolean that should be set

; NEEDSPEELING

# This boolean is commented out

SEEDSREMOVED

# How many bananas we have

NUMBEROFBANANAS 1024

NUMBEROFSTRAWBERRIES 62000</pre>