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Top Forums Shell Programming and Scripting Shell quoting rules for other languages programmers Post 302717797 by DGPickett on Thursday 18th of October 2012 03:01:42 PM
Old 10-18-2012
Well, avoiding injection attacks and massive mistakes, with or without eval, often revolves around using quotes corrrectly and expecting all sorts of poorly behaved input data.

Rather than storing data in multiple variables with intelligence in the name, use the array. I read that in bash, simple arrays are actually implemented in a linked list, so adjust your performance expectation for big sets downward accordingly. If numeric keys and simple arrays are inconvenient, use the array-like hash container types that take string keys, in bash called associtive arrays. Hash (random) access scales much better. You have to go to PERL and up to get real arrays, other sorts of linked lists and trees as well as hash mapped containters.
 

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ARRAY_MERGE_RECURSIVE(3)						 1						  ARRAY_MERGE_RECURSIVE(3)

array_merge_recursive - Merge two or more arrays recursively

SYNOPSIS
array array_merge_recursive (array $array1, [array $...]) DESCRIPTION
array_merge_recursive(3) merges the elements of one or more arrays together so that the values of one are appended to the end of the previ- ous one. It returns the resulting array. If the input arrays have the same string keys, then the values for these keys are merged together into an array, and this is done recur- sively, so that if one of the values is an array itself, the function will merge it with a corresponding entry in another array too. If, however, the arrays have the same numeric key, the later value will not overwrite the original value, but will be appended. PARAMETERS
o $array1 - Initial array to merge. o $... - Variable list of arrays to recursively merge. RETURN VALUES
An array of values resulted from merging the arguments together. EXAMPLES
Example #1 array_merge_recursive(3) example <?php $ar1 = array("color" => array("favorite" => "red"), 5); $ar2 = array(10, "color" => array("favorite" => "green", "blue")); $result = array_merge_recursive($ar1, $ar2); print_r($result); ?> The above example will output: Array ( [color] => Array ( [favorite] => Array ( [0] => red [1] => green ) [0] => blue ) [0] => 5 [1] => 10 ) SEE ALSO
array_merge(3), array_replace_recursive(3). PHP Documentation Group ARRAY_MERGE_RECURSIVE(3)
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