To strip all spaces out of a string in PHP, the code is as follows−Example Live DemoOutputThis will produce the following output−ThisisateststrinTo remove the whitespaces only, the below code can be used−Example Live DemoOutputThis will produce the following output. The str_replace function replaces the given input string with a specific character or string−thisisateststringTo remove whitespace that includes tabs and line end, the code can be used−Example Live DemoHere, the preg_match function is used with regular expressions. It searches for a pattern in a string and returns True if the pattern exists and false otherwise. This will produce the following output−thisisateststringRead More

Yes, it is possible to combine filter_input() with AND/OR in PHP. This can be done by looping over the POST fields−$value = filter_input(INPUT_POST, 'field', FILTER_DEFAULT, is_array($_POST['field']) ? FILTER_REQUIRE_ARRAY : NULL);An equivalent for the same user for each loop has been shown below−$memory = array(); //looping through all posted values foreach($_POST as $key => $value) {    //applying a filter for the array    if(is_array($value)) {       $ memory [$key] = filter_input(INPUT_POST, $key, {filters for array});    }    else {       $ memory [$key] = filter_input(INPUT_POST, $key, {filters for scalar});    } }

PHPStorm can be used to test PHP applications using the PHPUnit testing framework.The PHP interpreter needs to be configured in phpstorm.The Composer should be installed and initialized with respect to the current project.Below are the steps to configure PHPUnit testing −Download phpunit.phar (manually or using the composer) and save it on your machine.The PHPUnit needs to be integrated with a PhpStorm project. PHPUnit can be configured manually or automatically.A PHPUnit test needs to be generated for the class.Once the test has been generated, PHPUnit test methods need to be generated.Post this, the PHPUnit test needs to be debugged and run.Read More

The OPCache can be temporarily disabled by adding the below code to the script−ini_set('opcache.enable', 0);This can be used to tell whether OPCache was the reason behind the script failing. Due to this, the user will not have to go through every extension and turn them on/off to see which extension caused the issue.Finding the log that shows which file and what was the reason behind the script failing (when OPCache is enabled).If the user has more information about the application they are trying to debug, this is a feasible option to work on.ini_set('display_errors', 1); error_reporting(~0); If the above two solutions ... Read More

Beginning from PHP version 7, it has been made possible to create anonymous classes. Every object in PHP is associated with a class. The anonymous classes can be instantiated to create objects.Example Live DemoOutputDoes the instance belong to parent class? = bool(true)In the above code, a parent class (my_sample_class) has been created, and it has been instantiated with a child class (new class) that inherits from the parent class.We are checking if the instance belongs to the parent class. Since the child class is an extension of the parent class, it returns True as output.

Below is the same code to set encoding for FPDI library−Add new fonts that have the correct alphabets.$pdf->AddFont('DejaVu', '', 'DejaVuSansCondensed.php'); $pdf->SetFont('DejaVu', '', 10, '', false);The following are three possible encodings that are possible.cp1250 (Central Europe) cp1251 (Cyrillic) cp1252 (Western Europe) cp1253 (Greek) cp1254 (Turkish) cp1255 (Hebrew) cp1257 (Baltic) cp1258 (Vietnamese) cp874 (Thai) or ISO-8859-1 (Western Europe) ISO-8859-2 (Central Europe) ISO-8859-4 (Baltic) ISO-8859-5 (Cyrillic) ISO-8859-7 (Greek) ISO-8859-9 (Turkish) ISO-8859-11 (Thai) ISO-8859-15 (Western Europe) ISO-8859-16 (Central Europe) Or KOI8-R (Russian) KOI8-U (Ukrainian)Let us see an example to convert the UTF-8 to cp1250.$str = iconv('UTF-8', 'cp1250', 'zazółcić gęślą jaźń');Note− If the string sent ... Read More

Both get the union of arrays, but array_merge() overwrites duplicate non_numeric keys. Let us now see an example of the array+array−Example Live DemoOutputThis will produce the following output−array(8) {    ["p"]=>    string(3) "150"    ["q"]=>    string(3) "100"    ["r"]=>    string(3) "120"    ["s"]=>    string(3) "110"    ["t"]=>    string(3) "115"    ["u"]=>    string(3) "103"    ["v"]=>    string(3) "105"    ["w"]=>    string(3) "125" }ExampleLet us now see an example of array_merge() in PHP− Live DemoOutputThis will produce the following output−array(8) {    ["p"]=>    string(3) "150"    ["q"]=>    string(3) "100"    ["r"]=>    string(3) "120"    ["s"]=>    string(3) "110"    ["t"]=>    string(3) "115"    ["u"]=>    string(3) "110"    ["v"]=>    string(3) "105"    ["w"]=>    string(3) "100" }

The print and echo are both language constructs to display strings. The echo has a void return type, whereas print has a return value of 1 so it can be used in expressions. The print_r is used to display human-readable information about a variable.ExampleLet us now see an example that displays output using echo, print, and print_r: Live DemoOutputThis will produce the following output−Array... Value = John Value = Jacob Value = Tom Value = Tim Displaying Array Values using print... Value = John Value = Jacob Value = Tom Value = Tim Displaying Array Values using print_r... Array (    [0] => John    [1] => Jacob    [2] => Tom    [3] => Tim )

To return all dates between two dates, the code is as follows −Example Live DemoOutputThis will produce the following output−array(11) {    [0]=>    string(10) "10-11-2019"    [1]=>    string(10) "11-11-2019"    [2]=>    string(10) "12-11-2019"    [3]=>    string(10) "13-11-2019"    [4]=>    string(10) "14-11-2019"    [5]=>    string(10) "15-11-2019"    [6]=>    string(10) "16-11-2019"    [7]=>    string(10) "17-11-2019"    [8]=>    string(10) "18-11-2019"    [9]=>    string(10) "19-11-2019"    [10]=>    string(10) "20-11-2019" }

To reset keys of array elements using PHP, the code is as follows−Example Live DemoOutputThis will produce the following output−array(4) {    ["p"]=>    string(3) "150"    ["q"]=>    string(3) "100"    ["r"]=>    string(3) "120"    ["s"]=>    string(3) "110" } array(4) {    [0]=>    string(3) "150"    [1]=>    string(3) "100"    [2]=>    string(3) "120"    [3]=>    string(3) "110" }ExampleLet us now see another example − Live DemoOutputThis will produce the following output−array(4) {    [8]=>    string(3) "Ben"    [4]=>    string(5) "Kevin"    [7]=>    string(4) "Mark"    [3]=>    string(5) "Hanks" } array(4) {    [0]=>    string(3) "Ben"    [1]=>    string(5) "Kevin"    [2]=>    string(4) "Mark"    [3]=>    string(5) "Hanks" }