How to implode array with key and value without foreach in PHP

Question

Without foreach   how can I turn an array like this  array  item1   gt  object1    item2   gt  object2          item-n   gt  object-n      to a string like this  item1  object1   item2  object2       item-n  object-n    I thought about implode   already  but it doesn t implode the key with it   If foreach it necessary  is it possible to not nest the foreach    EDIT  I ve changed the string    EDIT2 UPDATE   This question was asked quite a while ago  At that time  I wanted to write everything in one line so I would use ternary operators and nest built in function calls in favor of foreach  That was not a good practice  Write code that is readable  whether it is concise or not doesn t matter that much   In this case  putting the foreach in a function will be much more readable and modular than writing a one-liner Even though all the answers are great

User · Answer

Using array walk   a   array  item1   gt  object1    item2   gt  object2   item-n   gt  object-n     r array    array walk  a  create function   b   c    global  r   r     c  b       echo implode        r     IDEONE

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Change   -    return substr  result   -1   strlen  glue          return substr  result  0  -1   strlen  glue      if you want to resive the entire String without the last  glue  function key implode  amp  array   glue         result           foreach   array as  key   gt   value             result     key          value    glue            return substr  result   -1   strlen  glue         And the usage    str   key implode  yourArray

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I spent measurements  100000 iterations   what fastest way to glue an associative array   Objective  To obtain a line of 1 000 items  in this format   key value key2 value2   We have array  for example     array          test0    gt  344       test1    gt  235       test2    gt  876               Test number one   Use http build query and str replace   str replace           http build query  array  null           Average time to implode 1000 elements  0 00012930955084904  Test number two   Use array map and implode   implode      array map          function   v   k                return  k      v                      array          array keys  array            Average time to implode 1000 elements  0 0004890081976675  Test number three   Use array walk and implode   array walk  array          function   amp  v   k                 v    k      v                   implode       array     Average time to implode 1000 elements  0 0003874126245348  Test number four   Use foreach        str           foreach  array as  key  gt  item             str     key      item                rtrim  str          Average time to implode 1000 elements  0 00026632803902445  I can conclude that the best way to glue the array - use http build query and str replace

User · Answer

You could use http build query  like this    lt  php    a array  item1   gt  object1    item2   gt  object2      echo http build query  a             gt    Output   item1 object1  item2 object2    Demo

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Here is a simple example  using class    input   array       element1     gt   value1        element2     gt   value2        element3    gt    value3      echo FlatData  flatArray  input              class FlatData        public static function flatArray array  input   array     separator elements          separator                        output   implode  separator elements  array map              function   v   k   s                    return sprintf   s  s  s    k   v                               input              array keys  input               array fill 0  count  input    separator                    return  output

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For create mysql where conditions from array   sWheres   array  item1     gt   object1                     item2     gt   object2                     item3     gt  1                    item4     gt  array 4 5                     item5     gt  array  object3   object4      sWhere       if  empty  sWheres         sWhereConditions   array        foreach   sWheres as  key   gt   value           if  empty  value                if is array  value                     value   array filter  value      For remove blank values from array                 if  empty  value                        array walk  value  function  amp  item    item   sprintf    s     item          For make value string type  string                       sWhereConditions     sprintf   s in   s     key  implode        value                                   else                   sWhereConditions     sprintf   s   s     key   value                                     if  empty  sWhereConditions             sWhere        implode   AND     sWhereConditions               echo  sWhere       item1  object1  AND item2  object2  AND item3  1  AND item4 in   4    5   AND item5 in   object3    object4

User · Answer

You could use PHP s array reduce as well    a     Name    gt   Last Name     function acc  acc  k use  a   return  acc     k      a  k          imploded   array reduce array keys  a    acc

User · Answer

There is also var export and print r more commonly known for printing debug output but both functions can take an optional argument to return a string instead   Using the example from the question as data    array     item1   gt  object1    item2   gt  object2   item-n   gt  object-n      Using print r to turn the array into a string  This will output a human readable representation of the variable    string   print r  array  true   echo  string    Will output   Array        item1    gt  object1      item2    gt  object2      item-n    gt  object-n     Using var export to turn the array into a string  Which will output a php string representation of the variable    string   var export  array  true   echo  string    Will output   array      item1    gt   object1      item2    gt   object2      item-n    gt   object-n       Because it is valid php we can evaluate it   eval   array2       var export  array  true          var dump  array2      array     Outputs   bool true

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and another way    input   array       item1     gt   object1        item2     gt   object2        item-n    gt   object-n       output   implode       array map      function   v   k            if is array  v                return  k       implode   amp    k         v            else              return  k      v                         input       array keys  input        or    output   implode       array map      function   v   k    return sprintf   s   s     k   v           input      array keys  input

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For debugging purposes  Recursive write an array of nested arrays to a string  Used foreach  Function stores National Language characters   function q  input         glue              function   function   v   k  use   amp  function   glue            if  is array  v                  arr                   foreach   v as  key   gt   value                     arr      function  value   key                              result         implode  glue   arr                   else                result   sprintf   s    s      k  var export  v  true                      return  result             return implode  glue  array map  function   input  array keys  input        n

User · Answer

I would use serialize   or json encode     While it won t give your the exact result string you want  it would be much easier to encode store retrieve decode later on

[php] How to implode array with key and value without foreach in PHP

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