Prior to PHP 8.0.0, their order were undefined (the sorting was not stable). If any of these sort functions evaluates two members as equal Variable itself, as opposed to returning a new sorted array Note: All of these sort functions act directly on the array The order of the sort: alphabetical, ascending (low to high),ĭescending (high to low), natural, random, or user defined Maintained after the sort, which may mean the keys are reset Whether or not the correlation between the keys and values are Some sort based on the array keys, whereas others by PHP has several functions that deal with sorting arrays, and this These two function takes two parameters, the first parameter is an array and the second is a callback function where you have to define the comparison logic.Getting Started Introduction A simple tutorial Language Reference Basic syntax Types Variables Constants Expressions Operators Control Structures Functions Classes and Objects Namespaces Enumerations Errors Exceptions Fibers Generators Attributes References Explained Predefined Variables Predefined Exceptions Predefined Interfaces and Classes Predefined Attributes Context options and parameters Supported Protocols and Wrappers Security Introduction General considerations Installed as CGI binary Installed as an Apache module Session Security Filesystem Security Database Security Error Reporting User Submitted Data Hiding PHP Keeping Current Features HTTP authentication with PHP Cookies Sessions Dealing with XForms Handling file uploads Using remote files Connection handling Persistent Database Connections Command line usage Garbage Collection DTrace Dynamic Tracing Function Reference Affecting PHP's Behaviour Audio Formats Manipulation Authentication Services Command Line Specific Extensions Compression and Archive Extensions Cryptography Extensions Database Extensions Date and Time Related Extensions File System Related Extensions Human Language and Character Encoding Support Image Processing and Generation Mail Related Extensions Mathematical Extensions Non-Text MIME Output Process Control Extensions Other Basic Extensions Other Services Search Engine Extensions Server Specific Extensions Session Extensions Text Processing Variable and Type Related Extensions Web Services Windows Only Extensions XML Manipulation GUI Extensions Keyboard Shortcuts ? This help j Next menu item k Previous menu item g p Previous man page g n Next man page G Scroll to bottom g g Scroll to top g h Goto homepage g s Goto search These two functions sort an array by values using a user-defined comparison function. If you want to sort a PHP multidimensional array order by values, you can use the usort() function.īut, the usort() function does not keep the array keys, and if you wish to keep the keys you can use the uasort() function. You can do the natural sorting by using the natsort() function that orders alphanumeric strings in the way a human being would while maintaining key/value associations, and the values keep their original keys. krsort() is for sorting by keys in descending order. ksort() is for sorting by keys in ascending order.If you want to sort an associative array in ascending or descending order by key, use the ksort() or krsort() function. arsort() is for sorting by values in descending order.This unset command takes the array key as input and removed that element from the array. The unset function is used to destroy any other variable and same way use to delete any element of an array. asort() is for sorting by values in ascending order. Using unset () Function: The unset () function is used to remove element from the array.If you want to sort an associative array in ascending or descending order by value but also want to keep the array keys, use the asort() or arsort() function. But these functions will convert the associative array into a numeric array. You can use the sort() or rsort() function to sort an associative array in ascending or descending order. Sort associative arrays in ascending and descending order by value The rsort() function is similar to the sort() function, but this function sorts an array in descending order by values.
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