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PHP is primarily used for which type of development?

  • Mobile application development
  • Desktop software development
  • Web development
  • Game development
PHP is primarily used for server-side web development. Unlike static HTML, PHP can interact with databases, manage cookies, process forms, and dynamically generate HTML content. Its integration with various database systems and its ability to easily handle dynamic content makes it a go-to language for web development. To learn more, visit: https://www.php.net/manual/en/intro-whatis.php
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What are some common practices in PHP cookie handling?

  • Setting secure and HTTP-only flags
  • Expiring cookies after a certain time
  • Encrypting cookie values
  • All the options
When handling cookies in PHP, it's important to follow best practices. This includes sanitizing user input to prevent security vulnerabilities, setting secure and HTTP-only flags to enhance security, expiring cookies after a certain time to manage their lifespan, and encrypting sensitive cookie values to protect data privacy. These practices help ensure the proper handling and security of cookies in PHP applications.
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The foreach loop in PHP is used exclusively for arrays.

  • Index
  • Element
  • Key
  • Value
The foreach loop in PHP is used to iterate over each element in an array. It allows you to access both the keys and values of the array elements during each iteration. The "key" variable represents the key/index of the current element, while the "value" variable holds the value of the element. This loop construct is particularly useful when you need to process each element of an array without explicitly managing the iteration counter. Learn more: https://www.php.net/manual/en/control-structures.foreach.php
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What is the difference between the functions strstr() and stristr()?

  • strstr() is case-sensitive, while stristr() is case-insensitive
  • strstr() returns the portion of the string after the first occurrence of a substring, while stristr() returns the portion of the string from the first occurrence of a substring onwards
  • There is no difference, both functions perform the same operation
  • stristr() returns a Boolean value, while strstr() returns a string value
The strstr() function in PHP returns the portion of a string starting from the first occurrence of a substring, while stristr() is case-insensitive in its search. They differ in case-sensitivity. Learn more: http://php.net/manual/en/function.strstr.php
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What PHP function is used to return the highest value from a list of numbers?

  • max()
  • min()
  • sort()
  • array_sum()
The max() function in PHP is used to return the highest value from a list of numbers. It accepts either an array of numbers or multiple arguments and returns the maximum value. This function is useful when you need to find the highest value among a set of numbers. Learn more: https://www.php.net/manual/en/function.max.php
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What are some differences between using PHP with MySQL versus other database systems?

  • Syntax differences in SQL queries
  • Database-specific functions
  • Performance characteristics
  • All of the above
When using PHP with different database systems, there can be differences in SQL syntax for writing queries. Each database system may have specific functions and features that are unique to that system. Additionally, performance characteristics, such as speed or scalability, can vary between different database systems. It's important to be aware of these differences when working with PHP and different databases to ensure compatibility, optimize performance, and make use of specific features or functionalities provided by the respective database systems.
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How can we display information of a variable and readable by a human with PHP?

  • Use the var_dump() function
  • Use the print_r() function
  • Use the info() function
  • Use the show() function
To display information about a variable in a human-readable format with PHP, you can use the print_r() function. The print_r() function is used to print the contents of an array or an object in a human-readable format. It can be useful for debugging or displaying complex data structures. For example, you can use print_r($array); to display the contents of an array. Another option is to use the var_dump() function, which provides more detailed information about a variable, including its type and size.
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You need to access several global variables from within a function in your PHP script. How would you do this using the $GLOBALS superglobal?

  • Access each global variable directly using the $GLOBALS array and the variable name as the key. Use multiple statements to retrieve the values of different global variables.
  • Assign the $GLOBALS array to a local variable inside the function and use it to access the global variables. Assign each global variable to a separate local variable.
  • Use the 'extract' function to extract the values of all global variables into local variables inside the function.
  • Use the 'include' statement to include a file that contains the global variables and then access them within the function.
To access multiple global variables from within a function using the $GLOBALS superglobal, you can access each variable directly using the $GLOBALS array and the variable name as the key. You can use multiple statements to retrieve the values of different global variables. Each statement will access a specific global variable. Learn more: https://www.php.net/manual/en/reserved.variables.globals.php
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You are writing a PHP script and you need to define an abstract class. How would you do this?

  • abstract class ClassName
  • final class ClassName
  • static class ClassName
  • var class ClassName
To define an abstract class in PHP, you can use the abstract keyword followed by the class keyword and the name of the class. For example: abstract class ClassName {} The abstract keyword indicates that the class is intended to be an abstract class. Abstract classes cannot be instantiated directly and are meant to be extended by other classes. They can contain abstract methods (without implementation) and non-abstract methods (with implementation). Refer to: http://php.net/manual/en/language.oop5.abstract.php
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Which of the following are true about the case keyword in a PHP switch statement?

  • It represents a possible value for the expression
  • It is used to define the default case
  • It can only be followed by a numeric value
  • It is not required in every case block
The case keyword in a PHP switch statement represents a possible value for the expression. Each case block represents a specific value or condition that is evaluated against the switch expression. When a case value matches the expression, the corresponding block of code is executed. The case keyword allows you to define multiple possible values or conditions to be compared within the switch statement. Each case represents a potential match with the expression. Learn more: https://www.php.net/manual/en/control-structures.switch.php
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