$custdata=array();
$custdata[] = array(
"firstname" => $row['firstname'] ."<br /> <br />",
"lastname" => $row['lastname'] ."<br /> <br />",
"email" => $row['email'] ."<br />",
"date" => $row['date'] ."<br />"
);
This is my array. My persons duplicates, so I can see the same person 1 , 2 ,3 or 5 times in array If i print it. How to remove duplicated values? But I need to do it by DATE. If person exist in array only the newest date leave in array.
Use the date as the key of the array
$custdata = array();
// a loop probably goes here
if (empty($custdata[$row['date']])) {
$custdata[$row['date']] = array(
"firstname" => $row['firstname'] ."<br /> <br />",
"lastname" => $row['lastname'] ."<br /> <br />",
"email" => $row['email'] ."<br />",
"date" => $row['date'] ."<br />"
);
}
In the end, if you don't want to keep the date keys, just use
$custdata = array_values($custdata);
Also, appending <br> to the array values might not be a very good idea.
It might be better to append the <br> when displaying the array.
take a look at array_unique function Since i dont know your exact requirement .This link will help you to understand array_unique function
How do I use array_unique on an array of arrays?
If I understood your question correctly, what you need to do is simply override the existing person using a unique key (Eg: his email). Here's an example:
<?php
$persons = array();
$persons["[email protected]"] = array(
"date" => "1/1/1970",
/** etc.. **/
);
$date = "2/1/1970";
// Override old person with new date
if (isset($person["[email protected]"])) {
if ($person["[email protected]"]["date"] < $date) {
$person["[email protected]"] = array(
"date" => $date,
/** etc.. **/
);
}
}
You need to set an array key for each person on $custdata.
$custdata['person_1'] = array();
$custdata['person_2'] = array();
....
Maybe use their email address as the key.
You can use array_key_exists() to check if a person has already been added. http://php.net/manual/en/function.array-key-exists.php
