php - get numeric index of associative array

Question

I have an associative array and I need to find the numeric position of a key  I could loop through the array manually to find it  but is there a better way build into PHP    a   array     blue      gt   nice      car       gt   fast      number    gt   none         echo  find numeric index of  a  car        output  1

User · Answer

blue keys   array search  blue   array keys  a      http   php net manual en function array-keys php

User · Answer

echo array search  car  array keys  a

User · Answer

All solutions based on array keys don t work for mixed arrays  Solution is simple   echo array search  needle array keys  haystack   true     From php net  If the third parameter strict is set to TRUE then the array search   function will search for identical elements in the haystack  This means it will also perform a strict type comparison of the needle in the haystack  and objects must be the same instance

User · Answer

a   array         blue      nice          car      fast          number      none         var dump array search  car   array keys  a     var dump array search  blue   array keys  a     var dump array search  number   array keys  a

User · Answer

While Fosco s answer is not wrong there is a case to be considered with this one  mixed arrays  Imagine I have an array like this    a   array     nice      car    gt   fast      none       Now  PHP allows this kind of syntax but it has one problem  if I run Fosco s code I get 0 which is wrong for me  but why this happens  Because when doing comparisons between strings and integers PHP converts strings to integers  and this is kinda stupid in my opinion   so when array search   searches for the index it stops at the first one because apparently   car     0  is true  Setting array search   to strict mode won t solve the problem because then array search  0   array keys  a   would return false even if an element with index 0 exists  So my solution just converts all indexes from array keys   to strings and then compares them correctly     echo array search  car   array map  strval   array keys  a       Prints 1  which is correct   EDIT  As Shaun pointed out in the comment below  the same thing applies to the index value  if you happen to search for an int index like this    a   array     foo    gt   bar      nice      car    gt   fast      none      ind   0  echo array search  ind  array map  strval   array keys  a       You will always get 0  which is wrong  so the solution would be to cast the index  if you use a variable  to a string like this    ind   0  echo array search  string  ind  array map  strval   array keys  a

User · Answer

a solution i came up with    probably pretty inefficient in comparison tho Fosco s solution    protected function getFirstPosition array array   content   key   true        index   0    if   key       foreach   array as  key   gt   value        if   key     content         return  index             index             else      foreach   array as  key   gt   value        if   value     content         return  index             index

[php] php - get numeric index of associative array

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