PHP Tutorials with Examples - Tutorial And Example

PHP usort() Function

PHP usort() Function The usort() function in PHP sorts array by values using a user-defined comparison function. Syntax


usort ( array &$array , callable $value_compare_func )

usort ( array &$array , callable $value_compare_func )

array(required)– This parameter represents the input array. value_compare_func(required)– This parameter represents a string that describe a callable comparison function. The comparison …

PHP uksort() Function

PHP uksort() Function The uksort() function in PHP sorts an array by keys using a user-defined comparison function. Syntax


uksort ( array &$array , callable $key_compare_func )

uksort ( array &$array , callable $key_compare_func )

Parameter array(required)– This parameter represents the input array. key_compare_func(required)– This parameter represents a string that describe a callable comparison function. …

PHP uasort() Function

PHP uasort() Function The uasort() function in PHP sorts an array with a user-defined comparison function and maintains the index association. Syntax


uasort ( array &$array , callable $value_compare_func )

uasort ( array &$array , callable $value_compare_func )

Parameter array(required)– This parameter represents the input array. value_compare_func(required)– This parameter represents a string that describe a …

PHP sort() Function

PHP sort() Function The sort() function in PHP sorts an array where the elements will be arranged from lowest to highest. Syntax


sort ( array &$array [, int $sort_flags = SORT_REGULAR ] )

sort ( array &$array [, int $sort_flags = SORT_REGULAR ] )

Parameter array(required)– This parameter represents the input array. sort_flags (optional)– This parameter is used to modify the behavior …

PHP sizeof() Function

PHP sizeof() Function The sizeof() function in counts all elements and return the size of the array. This function is an alias of count(). Syntax


sizeof( mixed $array_or_countable [, int $mode = COUNT_NORMAL ] )

sizeof( mixed $array_or_countable [, int $mode = COUNT_NORMAL ] )

Parameter array_or_countable(required)– This parameter represents the input array or countable object. mode(optional)– This parameter …

PHP shuffle() Function

PHP shuffle() Function The shuffle() function in PHP shuffles an array in a random array. Syntax


shuffle ( array &$array )

shuffle ( array &$array )

Parameter array(required)– This parameter represents the input array. Return This parameter returns a Boolean value TRUE on success or FALSE on failure. Example 1


<?php
 //initializing the array 
 $array = range(1, 20);
 echo("Original Array: \n");
 print_r($array);
 //shuffling the array in any random order
 shuffle($array); 
 echo("\nAfter shuffling the array: \n");
 print_r($array);
 ?>

<?php

//initializing the array

$array = range(1, 20);

echo("Original Array: \n");

print_r($array);

//shuffling the array in any random order

shuffle($array);

echo("\nAfter shuffling the array: \n");

print_r($array);

Output …

PHP rsort() Function

PHP rsort() Function The rsort () function in PHP is used to sort an array in reverse order i.e., highest to lowest. Syntax


rsort ( array &$array [, int $sort_flags = SORT_REGULAR ] )

rsort ( array &$array [, int $sort_flags = SORT_REGULAR ] )

Parameter array(required)– This parameter represents the input array. sort_flags (optional)– This parameter is used to modify the …

PHP reset() Function

PHP reset() Function The reset() function in PHP is used to set the internal pointer of an array to its first element and returns the value of the first array element. Syntax


reset ( array &$array )

reset ( array &$array )

Parameter array(required)– This parameter represents the input …

PHP range() Function

PHP range() Function The range () function in PHP is used to create an array containing a range of elements. Syntax


range ( mixed $start , mixed $end [, number $step = 1 ] )

range ( mixed $start , mixed $end [, number $step = 1 ] )

Parameter start(required)– This parameter represents the first value of the sequence. end(required)– This parameter represents the last sequence value …

PHP prev() Function The prev() function in PHP rewinds or moves back the internal array pointer one place backward and returns the prev array value. It behaves like next() function, except that this function rewinds the internal array pointer one …

PHP pos() Function

PHP pos() Function The pos() function in PHP returns the current element in an array which is initialized to the first element of the array. This function is an alias of current(). Syntax


pos ( array &$array )

pos ( array &$array )

Parameter array(required)– This parameter represents the …

PHP next() Function

PHP next() Function The next() function in PHP advances or moves the internal array pointer one place forward and returns the next array value. Syntax


next ( array &$array )

next ( array &$array )

Parameter array(required)– This parameter represents the input array. Return This parameter returns the next …

PHP natsort() Function

PHP natsort() Function The natsort() function in PHP Sort an array using a case insensitive “natural order” algorithm while maintaining the keys. Syntax


natsort ( array &$array )

natsort ( array &$array )

Parameter array(required)– This parameter represents the input array. Return This parameter returns a Boolean value TRUE on …

PHP natcasesort() Function

PHP natcasesort() Function The natcasesort() function in PHP Sort an array using a case insensitive “natural order” algorithm while maintaining the keys. Syntax


natcasesort ( array &$array )

natcasesort ( array &$array )

Parameter array(required)– This parameter represents the input array. Return This parameter returns a Boolean value TRUE on …

PHP list() Function

PHP list() Function The list() function in PHP sorts an array by key while maintaining the keys. Syntax


list ( mixed $var1 [, mixed $... ] )

list ( mixed $var1 [, mixed $... ] )

Parameter var1(required)– This parameter accepts variables separated by spaces. …(optional)– This parameter accepts a list of variables separated by spaces. Return …

PHP ksort() Function

PHP ksort() Function The ksort() function in PHP sorts an array by key while maintaining the keys. Syntax


ksort(array & $array[,int $sort_flags = SORT_REGULAR] )

ksort(array & $array[,int $sort_flags = SORT_REGULAR] )

Parameter array(required)– This parameter represents the input array. sort_flags(optional)– This parameter is used to modify the behavior of the sort. The …

PHP krsort() Function

PHP krsort() Function The krsort() function in PHP sorts an array by key in reverse order while maintaining the keys. Syntax


krsort (array & $array[,int $sort_flags= SORT_REGULAR] )

krsort (array & $array[,int $sort_flags= SORT_REGULAR] )

Parameter array(required)– This parameter represents the input array. sort_flags(optional)– This parameter is used to modify the behavior of …

PHP key() Function

PHP key() Function The key() function in PHP fetches a key from an array and returns the index element of the current array position. Syntax


key ( array $array )

key ( array $array )

Parameter array(required)– This parameter represents the input array. Return This function returns the key …

PHP key_exists() Function

PHP key_exists() Function The key_exists() function in PHP checks if the specified key or index exists in the array or not. Syntax


key_exists ( mixed $key , array $array )

key_exists ( mixed $key , array $array )

Parameter key(required)– This parameter represents the value to check. array(required)– This parameter signifies an input array with …

PHP in_array() Function

PHP in_array() Function The in_array() function in PHP checks if the value exists in the specified array or not. Syntax


in_array ( mixed $needle , array $haystack [, bool $strict = FALSE ] )

in_array ( mixed $needle , array $haystack [, bool $strict = FALSE ] )

Parameter needle(required)– This parameter represents the searched value. haystack(required)– This parameter represents the input array. strict(optional)- This parameter searches …