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PHP prev () function

The prev() function - this is a built-in function in PHP.
  • It is used to return the immediately previous element from the array of the element currently pointed to by the internal pointer.
  • We have already discussed the current() in PHP.
  • The current() function is used to return the value of the element currently pointed to by the internal a pointer, whereas prev() decrements or makes an internal pointer a pointer to the previous element of the currently specified element.
Syntax:
prev($array)
Parameters:This function takes one parameter $array. This is the array from which we want to find the current item.Return Value : Returns the value of the item in the array immediately before the item that the internal pointer is currently pointing to. If the array is empty, then the prev() function returns FALSE.The following programs illustrate the prev() function in PHP:Program 1 :  
// input array $arr = array ( "Ram" , "Shita" , "Geeta" , "Shyam" );  
// current function prints
// 1st element of the array. echo current ( $arr ). "" ;  
// the following function prints the following
// current element. echo next ( $arr ). "" ;  
// the previous function will print the previous element // current. Like the current element
// this is Sita, so the previous element will be Ram echo prev ( $arr );  
?>
Output:
Ram Shita Ram
Program 2 :  
// input array $arr = array ( ’a’ , ’ 2’ , ’z’ , ’ 8’ );  
// current function prints
// 1st element of the array. echo current ( $arr ). "" ;  
// the following function outputs the next
// current element. echo next ( $arr ). "" ;  
// print the next function again
// next element of the current one. echo next ( $arr ). "" ;  
// the previous function will print the previous element // current. As it is now
// the element is ’ z ’ so the previous element will be ’ 2 ’ echo prev ( $arr );  
?>
Output:
a 2 z 2
Link:
http://php.net /manual/en/function.prev.php

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