PHP foreach with Nested Array

Question

I have a nested array in which I want to display a subset of results  For example  on the array below I want to loop through all the values in nested array 1     Array      0     Array              0     one        1     Array                      0     1            1     2            2     3                     1     Array              0     two        1     Array                      0     4            1     5            2     6                     2     Array              0     three        1     Array                      0     7            1     8            2     9                     I was trying to use the foreach function but I cannot seem to get this to work  This was my original syntax  though I realise it is wrong       tmpArray   array array  one  array 1 2 3   array  two  array 4 5 6   array  three  array 7 8 9      foreach   tmpArray 1  as  value      echo  value      I was trying to avoid a variable compare on whether the key is the same as the key I want to search  i e    foreach   tmpArray as  key     value      if   key    1        echo  value          Any ideas

User · Answer

As I understand   all of previous answers   does not make an Array output  In my case   I have a model with parent-children structure  simplified code here    public function parent         return  this- gt belongsTo  App Models Accounting accounting coding    parent id        public function children          return  this- gt hasMany  App Models Accounting accounting coding    parent id        and if you want to have all of children IDs as an Array   This approach is fine and working for me    public function allChildren          allChildren           if   this- gt has branch             foreach   this- gt children as  child                  subChildren    child- gt allChildren                 if  count  subChildren     1                     allChildren        subChildren 0                 else if  count  subChildren   gt  1                     allChildren     subChildren                                     allChildren        this- gt id   adds self Id to children Id list      return  allChildren       the allChildren   returns   all of childrens as a simple Array

User · Answer

foreach   tmpArray as  innerArray            Check type     if  is array  innerArray                Scan through inner loop         foreach   innerArray as  value                echo  value                 else             one  two  three         echo  innerArray

User · Answer

Both syntaxes are correct  But the result would be Array  You probably want to do something like this   foreach   tmpArray 1  as  value      echo  value 0     foreach  value 1  as  val       echo  val          This will print out the string  two    value 0   and the integers 4  5 and 6 from the array   value 1

User · Answer

If you know the number of levels in nested arrays you can simply do nested loops  Like so       Scan through outer loop foreach   tmpArray as  innerArray            Check type     if  is array  innerArray                Scan through inner loop         foreach   innerArray as  value                echo  value                 else             one  two  three         echo  innerArray            if you do not know the depth of array you need to use recursion  See example below       Multi-dementional Source Array  tmpArray   array      array  one   array 1  2  3        array  two   array 4  5  6        array  three   array              7              8              array  four   9  10                 Output array displayArrayRecursively  tmpArray           Recursive function to display members of array with indentation        param array  arr Array to process     param string  indent indentation string     function displayArrayRecursively  arr   indent           if   arr            foreach   arr as  value                if  is array  value                                        displayArrayRecursively  value   indent    --                  else                       Output                 echo   indent  value  n                                       The code below with display only nested array with values for your specific case  3rd level only    tmpArray   array      array  one   array 1  2  3        array  two   array 4  5  6        array  three   array 7  8  9           Scan through outer loop foreach   tmpArray as  inner             Check type     if  is array  inner                 Scan through inner loop         foreach   inner 1  as  value               echo   value  n

[php] PHP foreach with Nested Array?

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