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Top Forums Shell Programming and Scripting Array not surviving while loop Post 302417543 by DrSammyD on Friday 30th of April 2010 02:06:31 AM
Old 04-30-2010
Array not surviving while loop

So I'm trying to read datafile into an array, with each line representing one variable in the array. I'm successful at first but somehow it keeps getting erased.

Code:
i=0
grep '.*' datafile | while read line
do
	echo $i
	array[$i]=$(echo $line)
	echo ${array[1]} #printing array to make sure it's still there
	(( i++ ))
done

echo ${array[1]} #isn't there anymore

Sooo, do any of you know what's happening?
 

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PRINT_R(3)								 1								PRINT_R(3)

print_r - Prints human-readable information about a variable

SYNOPSIS
mixed print_r (mixed $expression, [bool $return = false]) DESCRIPTION
print_r(3) displays information about a variable in a way that's readable by humans. print_r(3), var_dump(3) and var_export(3) will also show protected and private properties of objects with PHP 5. Static class members will not be shown. PARAMETERS
o $expression - The expression to be printed. o $return - If you would like to capture the output of print_r(3), use the $return parameter. When this parameter is set to TRUE, print_r(3) will return the information rather than print it. RETURN VALUES
If given a string, integer or float, the value itself will be printed. If given an array, values will be presented in a format that shows keys and elements. Similar notation is used for objects. When the $return parameter is TRUE, this function will return a string. Otherwise, the return value is TRUE. NOTES
Note When the $return parameter is used, this function uses internal output buffering so it cannot be used inside an ob_start(3) callback function. EXAMPLES
Example #1 print_r(3) example <pre> <?php $a = array ('a' => 'apple', 'b' => 'banana', 'c' => array ('x', 'y', 'z')); print_r ($a); ?> </pre> The above example will output: <pre> Array ( [a] => apple [b] => banana [c] => Array ( [0] => x [1] => y [2] => z ) ) </pre> Example #2 $return parameter example <?php $b = array ('m' => 'monkey', 'foo' => 'bar', 'x' => array ('x', 'y', 'z')); $results = print_r($b, true); // $results now contains output from print_r ?> SEE ALSO
ob_start(3), var_dump(3), var_export(3). PHP Documentation Group PRINT_R(3)
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