Loop through array and replace value if in another array?

Question

I am trying to loop through an array and replace values that are in_array of a different array.

$array = array("username"=>"Bill", "email" => "Email Address");
$unset = array("Username","Email Address"); // Array of default values for inputs
foreach($array as $key => $value) {
    global $unset;
    if(in_array($value, $unset)) {
        $value = "-";
    }
}
print_r($array["email"]);

I want to replace the value in $array in which matches a default value to "-". Not looking to unset and array_splice, hold the space.

replacing $value = "-" with $array[$key] = "-"; works as well. — user1631995
– user1631995, Commented Aug 30, 2012 at 1:35
you can also use foreach($array as $key=>&$value) -- note the ampersand. remember to unset($value) after the loop if you do this though, lest you accidentally overwrite the lest element later. — mpen
– mpen, Commented Aug 30, 2012 at 1:37
@Mark I will research more on all this, I am still trying to learn foreach. Thank you for the heads up :) — user1631995
– user1631995, Commented Aug 30, 2012 at 1:38
the ampersand makes $value a reference to the original item in the array. without it you're essentially just editing a copy. — mpen
– mpen, Commented Aug 30, 2012 at 1:39
very good. very good. this foreach stuff has always been confusing to me, but that explanation was very good. — user1631995
– user1631995, Commented Aug 30, 2012 at 1:41

Korikulum · Accepted Answer · 2012-08-30 01:31:32Z

2

Try this:

$array = array("username"=>"Bill", "email" => "Email Address");
$unset = array("Username","Email Address"); // Array of default values for inputs

foreach($array as &$value) {
    if(in_array($value, $unset)) {
        $value = "-";
    }
}
print_r($array["email"]);

answered Aug 30, 2012 at 1:31

Korikulum

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user1631995 Over a year ago

That also works! I just found that $array[$key] = "-"; works. I will use your method and research a little on it.

jfmbrennan · Accepted Answer · 2012-08-30 01:37:11Z

0

Another approach would be

$array = array("username"=>"Bill", "email" => "Email Address");
$unset = array("Username","Email Address"); // Array of default values for inputs
foreach($array as $key => $value) {
    if(in_array($value, $unset)) {
        $array[$key] = "-";
    }
}
print_r($array["email"]);

answered Aug 30, 2012 at 1:37

jfmbrennan

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