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@ 2019-03-12T12:25:32Z

<?php 

/* Build the array */
$result = [];

for($i=0;$i<4;$i++){
    $result[] = [
        'id' => $i + 1,
        'title' => 'task '.($i + 1),
        'tech_user_id' => 1,
        'dev_priority' => $i + 1       
    ];
}

/* Build the array ends */

function reArrange(&$result,$id,$new_dev_priority){
    $curr_index  = array_search($id,array_column($result,"id"),true);
    $limit_index = array_search($new_dev_priority,array_column($result,"dev_priority"),true);
    
    $process_node = $result[$curr_index];
    $curr_dev_priority = $process_node['dev_priority'];
    if($curr_dev_priority === $new_dev_priority) return; // return if same priority was assigned.    
    $offset = $curr_dev_priority > $new_dev_priority ? -1 : 1;
    
    /* rearrange by relocating elements to a new location(this is a minimized push) */
    while($curr_index != $limit_index){
        $result[$curr_index] = $result[$curr_index + $offset];
        $result[$curr_index]['dev_priority'] = $result[$curr_index]['dev_priority'] - $offset;        
        $curr_index += $offset;
    }  
    
    $process_node['dev_priority'] = $new_dev_priority; // assign new dev priority
    $result[$curr_index] = $process_node;
}

echo "Initial state:##########",PHP_EOL;

print_r($result);
reArrange($result,3,1);
echo "Rearranged state:##########",PHP_EOL;
print_r($result);

Output for git.master, git.master_jit, rfc.property-hooks: Initial state:########## Array ( [0] => Array ( [id] => 1 [title] => task 1 [tech_user_id] => 1 [dev_priority] => 1 ) [1] => Array ( [id] => 2 [title] => task 2 [tech_user_id] => 1 [dev_priority] => 2 ) [2] => Array ( [id] => 3 [title] => task 3 [tech_user_id] => 1 [dev_priority] => 3 ) [3] => Array ( [id] => 4 [title] => task 4 [tech_user_id] => 1 [dev_priority] => 4 ) ) Rearranged state:########## Array ( [0] => Array ( [id] => 3 [title] => task 3 [tech_user_id] => 1 [dev_priority] => 1 ) [1] => Array ( [id] => 1 [title] => task 1 [tech_user_id] => 1 [dev_priority] => 2 ) [2] => Array ( [id] => 2 [title] => task 2 [tech_user_id] => 1 [dev_priority] => 3 ) [3] => Array ( [id] => 4 [title] => task 4 [tech_user_id] => 1 [dev_priority] => 4 ) )

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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