Php empty string to null
(PHP 4, PHP 5, PHP 7, PHP 8) Show empty — Determine whether a variable is empty Descriptionempty(mixed Parametersvar Variable to be checked No warning is generated if the variable does not exist. That means empty() is essentially the concise equivalent to !isset($var) || $var == false. Return Values Returns ExamplesExample #1 A simple empty() / isset() comparison.
Example #2 empty() on String Offsets
The above example will output: bool(true) bool(false) bool(false) bool(false) bool(true) bool(true) Notes
See Also
Nanhe Kumar ¶ 8 years ago
$testCase as $k => $v) { Janci ¶ 13 years ago
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$testCase as $key => $case ) {
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$testCase as $k => $v) { GazetteSDF ¶ 4 years ago
Javier Alfonso ¶ 6 years ago
$a['key'])?'A empty':'A not empty'), ' - ', (empty($b['key'])?'B empty':'B not empty'), ' - ', (empty($c['key'])?'C empty':'C not empty'), ' - ', (empty($d['key'])?'D empty':'D not empty'); xzero at elite7hackers dot net ¶ 5 years ago
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class EmptyClass { Is empty string NULL in PHP?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 .
Is empty string in PHP?We can use empty() function to check whether a string is empty or not. The function is used to check whether the string is empty or not. It will return true if the string is empty. Parameter: Variable to check whether it is empty or not.
IS NULL is same as in PHP?Null is just another datatype in PHP, which has only one value (null). Since PHP is a loosly typed language, it can be confusing how it handles different values. "", 0, "0", False, array(), Null are all considered False in PHP. Null, however, is a different kind of animal.
Is NULL or empty?The Java programming language distinguishes between null and empty strings. An empty string is a string instance of zero length, whereas a null string has no value at all. An empty string is represented as "" . It is a character sequence of zero characters.
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