Coder Snippets

Array to JSON function

Sirbastian — Fri, 04 Dec 2009 16:53:42 +0000

/**
 * Converts an associative array of arbitrary depth and dimension into JSON representation.
 *
 * NOTE: If you pass in a mixed associative and vector array, it will prefix each numerical
 * key with "key_". For example array("foo", "bar" => "baz") will be translated into
 * {'key_0': 'foo', 'bar': 'baz'} but array("foo", "bar") would be translated into [ 'foo', 'bar' ].
 *
 * @param $array The array to convert.
 * @return mixed The resulting JSON string, or false if the argument was not an array.
 * @author Andy Rusterholz
 */
function array_to_json( $array ){

    if( !is_array( $array ) ){
        return false;
    }

    $associative = count( array_diff( array_keys($array), array_keys( array_keys( $array )) ));
    if( $associative ){

        $construct = array();
        foreach( $array as $key => $value ){

            // We first copy each key/value pair into a staging array,
            // formatting each key and value properly as we go.

            // Format the key:
            if( is_numeric($key) ){
                $key = "key_$key";
            }
            $key = "'".addslashes($key)."'";

            // Format the value:
            if( is_array( $value )){
                $value = array_to_json( $value );
            } else if( !is_numeric( $value ) || is_string( $value ) ){
                $value = "'".addslashes($value)."'";
            }

            // Add to staging array:
            $construct[] = "$key: $value";
        }

        // Then we collapse the staging array into the JSON form:
        $result = "{ " . implode( ", ", $construct ) . " }";

    } else { // If the array is a vector (not associative):

        $construct = array();
        foreach( $array as $value ){

            // Format the value:
            if( is_array( $value )){
                $value = array_to_json( $value );
            } else if( !is_numeric( $value ) || is_string( $value ) ){
                $value = "'".addslashes($value)."'";
            }

            // Add to staging array:
            $construct[] = $value;
        }

        // Then we collapse the staging array into the JSON form:
        $result = "[ " . implode( ", ", $construct ) . " ]";
    }

    return $result;
}

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Define an array of data with PHP and JSON

Sirbastian — Wed, 25 Nov 2009 00:08:13 +0000

Something I've always wanted was a way to store an array of data within a PHP define variable.

The only solution I've come up with for this is to store JSON text in the define then decode it into an array when the data is needed.

My example will store some settings used to connect to a database.

Firstly you've got to define DBCONFIG using JSON

     define('DBCONFIG', '{"aDbHost":"localhost","aDbUser":"root","aDbPass":"hello1","aDbName":"mydatabase","debugging":"false"}');

Load the JSON into an array using:

     $aConfigArray = json_decode(DBCONFIG, true);
     // true tells the function to return an array not an object

Now you can extract the array into seperate variables.

     extract($aConfigArray);

Once you've extracted all of the variables you can use them however you need.

$aDb = mysql_connect($aDbHost, $aDbUSer,  $aDbPass);
mysql_select_db($aDbName);

print 'Host: '. $aDbHost;
print 'User: '. $aDbUser;
print 'Pass: '. $aDbPass;
print 'DB Name: '. $aDbName;

Outputs:
Host: localhost
User: root
Pass: hello1
DB Name: mydatabase

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Return readable filesize

Sirbastian — Thu, 27 Aug 2009 10:16:43 +0000

	function get_file_size($filename, $size_in = 'MB')
	{
		$size_in_bytes = filesize($filename);

		if($size_in == 'B')
		{
			$size = $size_in_bytes;
			$precision = 0;
		}
		elseif($size_in == 'KB')
		{
			$size = (($size_in_bytes / 1024));
			$precision = 2;
		}
		elseif($size_in == 'MB')
		{
			$size = (($size_in_bytes / 1024) / 1024);
			$precision = 2;
		}
		elseif($size_in == 'GB')
		{
			$size = (($size_in_bytes / 1024) / 1024) / 1024;
			$precision = 2;
		}

		$size = round($size, $precision);

		return $size.' '.$size_in;
	}

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Outline web page structure with CSS

Sirbastian — Wed, 12 Aug 2009 06:50:58 +0000

* { outline: 2px dotted red }
* * { outline: 2px dotted green }
* * * { outline: 2px dotted orange }
* * * * { outline: 2px dotted blue }
* * * * * { outline: 1px solid red }
* * * * * * { outline: 1px solid green }
* * * * * * * { outline: 1px solid orange }
* * * * * * * * { outline: 1px solid blue }

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PHP Snippet

Sirbastian — Mon, 10 Aug 2009 08:51:01 +0000

	switch ($aReturn)
	{
		case 'CSV':
			return substr_replace($aContent ,"",-1);
			break;

		case 'Array':
			return $aSuperGroupLinkArray;
			break;

		case 'Error';
			return $aErrorContent;
			break;

		default;
			return $aErrorContent;
			break;
	}

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