Are there dictionaries in php

Question

For example    names     bob 27  billy 43  sam 76      and then be able to reference it like this     names bob

User · Answer

Normal array can serve as a dictionary data structure  In general it has multipurpose usage  array  list  vector   hash table  dictionary  collection  stack  queue etc   names          bob    gt  27       billy    gt  43       sam    gt  76       names  bob     And because of wide design it gains no full benefits of specific data structure  You can implement your own dictionary by extending an ArrayObject or you can use SplObjectStorage class which is map  dictionary  implementation allowing objects to be assigned as keys

User · Answer

No  there are no dictionaries in php  The closest thing you have is an array  However  an array is different than a dictionary in that arrays have both an index and a key  Dictionaries only have keys and no index  What do I mean by that   array   array       quot foo quot    gt   quot bar quot        quot bar quot    gt   quot foo quot         as of PHP 5 4  array          quot foo quot    gt   quot bar quot        quot bar quot    gt   quot foo quot       The following line is allowed with the above array but would give an error if it was a dictionary  print  array 0   Python has both arrays and dictionaries

User · Answer

Associative array in PHP actually considered as a dictionary  An array in PHP is actually an ordered map  A map is a type that associates values to keys  it can be treated as an array  list  vector   hash table  an implementation of a map   dictionary  collection  stack  queue  and probably more   lt  php  array   array       quot foo quot    gt   quot bar quot        quot bar quot    gt   quot foo quot          Using the short array syntax  array          quot foo quot    gt   quot bar quot        quot bar quot    gt   quot foo quot        gt   An array is different than a dictionary in that arrays have both an index and a key  Dictionaries only have keys and no index

User · Answer

http   php net manual en language types array php    lt  php  array   array       foo    gt   bar        bar    gt   foo          as of PHP 5 4  array          foo    gt   bar        bar    gt   foo        gt    Standard arrays can be used that way

[php] Are there dictionaries in php?

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