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I want to convert this array that Array[4] should not give null it can give blank space (empty string).
Array (
[0] => 1
[1] => 4
[2] => 0
[3] => V
[4] =>
[5] => N
);
(The reason for the change, unrelated to the general question)
Fatal error: Uncaught exception
'PDOException' with message 'Database
error [23000]: Column 'message' cannot
be null, driver error code is 1048' in
777
is_null() The empty() function returns true if the value of a variable evaluates to false . This could mean the empty string, NULL , the integer 0 , or an array with no elements. On the other hand, is_null() will return true only if the variable has the value NULL .
A variable is NULL if it has no value, and points to nowhere in memory. empty() is more a literal meaning of empty, e.g. the string "" is empty, but is not NULL . The following things are considered to be empty: "" (an empty string) 0 (0 as an integer)
Syntax to create an empty array: $emptyArray = []; $emptyArray = array(); $emptyArray = (array) null; While push an element to the array it can use $emptyArray[] = “first”. At this time, $emptyArray contains “first”, with this command and sending “first” to the array which is declared empty at starting.
NULL essentially means a variable has no value assigned to it; false is a valid Boolean value, 0 is a valid integer value, and PHP has some fairly ugly conversions between 0 , "0" , "" , and false . Show activity on this post. Null is nothing, False is a bit, and 0 is (probably) 32 bits.
PHP 5.3+
$array = array_map(function($v){
return (is_null($v)) ? "" : $v;
},$array);
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