Let’s say the following is our array −$isMarriedDetails = [    false,    true,    false,    true,    true,    false,    false,    true,    false ];To count true and false values from an array, at first, count total values and subtract the number of true results. In ... Read More

For this, use foreach loop along with [] and implement arary_values() method.Example Live Demo OutputArray ( [0] => Array ( [0] => Array ( [LASTNAME] => Doe [FIRSTNAME] => John ) ) [1] => Array ( [0] => Array ( [LASTNAME] => Miller [FIRSTNAME] => David ) ) )

To create associative arrays in PHP, use [] brackets. You don't need to use array_push().Example Live Demo OutputArray ( [0] => Array ( [emp_id] => 101 [emp_first_name] => John [emp_last_name] => Doe [emp_country_name] => AUS ) )

No, you cannot define constant in class constructor, you can use constant at the class level.Let’s say we have the following class −class ConstantDemo { }Define a constant in the class −class ConstantDemo {     const LANGUAGE_NAME="PHP"; } Example Live Demo OutputThe language Name is=PHP

Let’s say we have the following value −$nextValue=100;Let us take a new variable and assign a reference −$currentValue = &$nextValue;To assign a reference, use the reference assignment operator i.e. =&$anyVariableName in PHP.The PHP code is as follows −Example Live Demo OutputNext Value=100 Current Value=100 After changing the ... Read More

Let’s say the following is our object −$employeeDetails = (object) [     'firstName' => 'John',     'lastName' => 'Doe',     'countryName' => 'US' ];We want the following output i.e. only the keys −firstName lastName countryNameTo display only the keys from an object, use array_keys() in PHP.Example Live Demo ... Read More

To convert timestamp to string, use setTimestamp(). Let’s say the following is our input i.e. timestamp −$SQLTimestamp = 1600320600000;We want the following output i.e. Date string −2020-09-17 05:30:00At first, get seconds from Timestamp −$seconds = round($SQLTimestamp/1000, 0);Example Live Demo Output2020-09-17 05:30:00

Let’s say we have the following array −$namesArray = ['John', 'Adam', 'Robert'];We want the following output i.e. an associative array from the above array −Array ( [John] => Array ( [Adam] => Array ( [Robert] => Smith ) ) )Example Live Demo OutputArray ( [John] => Array ( [Adam] => Array ( [Robert] => Smith ) ) ) Doe

For this, use the foreach loop and insert into statement in order to insert all combinations of values in PHP arrays.Let’s say we have the following arrays −$name1 = ["John", "Mike"]; $name2 = ["David", "Sam"]; $name3 = ["Bob", "Adam"];Example Live Demo

Use two loops, one for row and another for column. Fr matrix form, use the tab \t in the nested loop like his −twoDimensionalArray[row][col],"\t";Example Live Demo Output777 777 777Above, you can see the output is in matrix form 3x3.