Hướng dẫn is set empty php?
(PHP 4, PHP 5, PHP 7, PHP 8) 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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"Time taken: " . (microtime(true) - $ts) . " sec\n"; your dot brother dot t at hotmail dot com ¶ 7 years ago
Glass { martin dot aarhof at gmail dot com ¶ 10 years ago
Anonymous ¶ 14 years ago
chrisdmiddleton at gmail dot com ¶ 8 years ago
$var); wranvaud at gmail dot com ¶ 5 years ago
Claudio Galdiolo ¶ 5 years ago
phpsort ¶ 11 years ago
denobasis-bozic et yahoo.com ¶ 13 years ago
$testCase as $key => $case ) {
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Lukas ¶ 4 months ago
$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
aditycse at gmail dot com ¶ 4 years ago
class EmptyClass { |