Sort Functions For Arrays in PHP

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The elements in an array in PHP can be sorted in alphabetical or numerical order, descending or ascending.

In thistutorial, we will go through the following PHP array sort functions:

  • sort() – sort arrays in ascending order
  • rsort() – sort arrays in descending order
  • asort() – sort associative arrays in ascending order, according to the value
  • ksort() – sort associative arrays in ascending order, according to the key
  • arsort() – sort associative arrays in descending order, according to the value
  • krsort() – sort associative arrays in descending order, according to the key

Sort Array in Ascending Order – sort()

The following example sorts the elements of the $cars array in ascending alphabetical order:

Sort Array in Descending Order – rsort()

The following example sorts the elements of the $cars array in descending alphabetical order:

The following example sorts the elements of the $numbers array in descending numerical order:

Sort Array (Ascending Order), According to Value – asort()

The following example sorts an associative array in ascending order, according to the value:

Sort Array (Ascending Order), According to Key – ksort()

The following example sorts an associative array in ascending order, according to the key:

Sort Array (Descending Order), According to Value – arsort()

The following example sorts an associative array in descending order, according to the value:

Sort Array (Descending Order), According to Key – krsort()

The following example sorts an associative array in descending order, according to the key: