- print_r: documentation ( source)
- array_unique: documentation ( source)
<?php
$target_array = array(
array("sss" => array("0"=>315, "1" => 330,"2"=>345)),
array("EEE" => array("0"=>315, "1" => 330,"2"=>750))
);
$target_array = array_unique($target_array,SORT_REGULAR);
print_r($target_array);