You need to iterate using three for loops and lookup in given day, month and year. If the day, month and year is available, then put them into a variable.ExampleThe PHP code is as follows Live Demo OutputThis will produce the following outputThe next date value is =2018-05-25

Let’s say the following is our string with new line $sentence = " My name is John Smith My Favorite subject is PHP. ";We need to remove the new line above and replace with a whitespace i.e. the output should be −My name is John Smith My Favourite subject is PHP.For this, use trim() and withing that preg_replace() to replace.ExampleThe PHP code is as follows Live Demo OutputThis will produce the following outputMy name is John Smith My Favorite subject is PHP.

For this, use preg_split() along with array_shift() and array_pop(). Let’s say the following is our string with letters and numbers $values = "5j4o5h8n";We want to display the numbers and letters in separate arrays.ExampleThe PHP code is as follows Live Demo OutputThis will produce the following outputArray ( [0] => j [1] => o [2] => h [3] => n ) Array ( [0] => 5 [1] => 4 [2] => 5 [3] => 8 )

To print time an hour ago, you need to subtract -1 hour. Use the strtotime() method and set the subtraction value in it i.e. -1 for 1 hour ago time, -2 for 2 hour ago time, etc.Let’s say the current time is 18:42:22ExampleThe PHP code is as follows Live Demo OutputThis will produce the following outputOne hour ago, the date = 2020-09-26 17:42:22

To call a function from a string stored in a variable, use $func.The syntax is as follows $func=’anyFunctionName’;ExampleThe PHP code is as follows  Live Demo OutputThis will produce the following outputCalling hello method.

In order to get bold text, you need to use font-weight and to get the simple text you can use tag. All this gets added in the echo.ExampleThe PHP code is as follows Live Demo OutputHere is the snapshot of sample output.This is my first PHP Program

For this, at first use preg_split() and set the function with this −'//u'After setting like above, the empty delimiter issue will get fixed, since we added '//u' above.ExampleThe PHP code is as follows Live Demo OutputThis will produce the following output −Array ( ) Array ( [0] => J [1] => o [2] => h [3] => n [4] => [5] => S [6] => m [7] => i [8] => t [9] => h )

Let’s say we have the following two arrays $firstArray=array(10,20,30,40,50); $secondArray=array(100,80,30,40,90);We need to find the matching i.e. the output should be 30 40ExampleThe PHP code is as follows Live Demo OutputThis will produce the following output The matching result is=30 The matching result is=40

To get a value from JSON, use json_decode(). Let’s say the following is our JSON $detailsJsonObject = '{"details":[{"name":"John","subjectDetails":{"subjectId":"101","subjectName":"PHP","marks":"58", "teacherName":"Bob"}}]}';  We need to fetch specific values i.e. Subject Name, Marks, etc.ExampleThe PHP code is as follows  Live Demo OutputThis will produce the following outputThe Subject Name is=PHP The Teacher Name is=Bob

To get the last part of URL, use preg_match() in PHP. Let’s say the following is our input URL $websiteAddress='https://www.tutorialspoint.com/java/java_questions_answers/9989809898';We need to get the following output, with only the last part, which is a number 9989809898'ExampleFollowing is the PHP code to get the last part of URL  Live Demo OutputThis will produce the following outputThe result is as follows:82345999