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02-28-2013, 03:33 PM #1
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- Apr 2010
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How do you find ONLY unique strings in an array?
I have a list of 4000 web addresses. I need to extract all the web addresses that only occur once. Any that are in the list twice or more I don't want to know about.
How do you extract unique strings?
02-28-2013, 03:41 PM #2PHP Code:
$input = array("a" => "green", "red", "b" => "green", "blue", "red");
$result = array_unique($input);
[a] => green
 => red
 => blue
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Those who understand Binary and those who dont.
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03-01-2013, 04:46 PM #3
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- Jan 2010
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@arctic: I think he meant not to exclude duplicate values, but to find values that that are present once and only once.
array_count_values() (and array_filter()) should be what you’ll need.The computer is always right. The computer is always right. The computer is always right. Take it from someone who has programmed for over ten years: not once has the computational mechanism of the machine malfunctioned.André Behrens, NY Times Software Developer