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What are the methods for sorting arrays in PHP?

慕斯

May 27, 2021 am 10:31 AM

php array

The previous article introduced you to "What is a PHP array?" How to use PHP arrays? 》, this article continues to introduce PHP array sorting to you. I don’t know how much you know about array sorting. This article has a certain reference value, let’s take a look! ! !

What are the methods for sorting arrays in PHP?

#Elements in a PHP array can be arranged in descending or ascending order alphabetically or numerically.

PHP array sorting function methods include : sort(), rsort(), asort(), ksort(), arsort(), krsort().

PHP - Array sorting function

What are the methods for sorting arrays in php?

In this chapter, we will introduce the following PHP array sorting functions one by one:

sort() - Sort the array in ascending order
rsort() - Sort the array in descending order
asort() - Sort the array in ascending order based on the value of the associative array
ksort() - Sort the array in ascending order based on the keys of the associative array
arsort() - Sort the array based on the association The value of the array, sort the array in descending order
krsort() - Sort the array in descending order based on the key of the associative array
sort() - Sort the array in ascending order

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

The running code is as follows:

<?php
$cars=array("Lamborghini","Maserati","Maybach");
sort($cars);
$clength=count($cars);
for($x=0;$x<$clength;$x++)
{
  echo $cars[$x];
  echo "<br />";
}
?>

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The running result is as follows:

What are the methods for sorting arrays in PHP?

The following example will $numbers elements in the array Arrange in ascending order of numbers:

<?php
$numbers=array(2,8,5,4,12);
sort($numbers);
$arrlength=count($numbers);
for($x=0;$x<$arrlength;$x++)
{
   echo $numbers[$x];
   echo "<br />";
}
?>

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The running results are as follows:

What are the methods for sorting arrays in PHP?

rsort() - Sort the array in descending order:

<?php
$cars=array("Lamborghini","Maserati","Maybach");
rsort($cars);
$clength=count($cars);
for($x=0;$x<$clength;$x++)
{
  echo $cars[$x];
  echo "<br />";
}
?>

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The running results are as follows:

What are the methods for sorting arrays in PHP?

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

<?php
$numbers=array(6,45,20,2,11);
rsort($numbers);
$arrlength=count($numbers);
for($x=0;$x<$arrlength;$x++)
{
echo $numbers[$x];
echo "<br />";
}
?>

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The running results are as follows:

What are the methods for sorting arrays in PHP?

##asort() - Arrange the array in ascending order based on the value of the array

<?php
$age=array("mary"=>"35","Bili"=>"37","Joey"=>"43");
asort($age);
foreach($age as $x=>$x_value)
{
   echo "Key=" . $x . ", Value=" . $x_value;
   echo "<br />";
}
?>

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The running results are as follows:

What are the methods for sorting arrays in PHP?

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