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What is the difference between sort() and rsort() in PHP?

  • sort() sorts the array in ascending order, while rsort() sorts it in descending order.
  • sort() works on indexed arrays, while rsort() works on associative arrays.
  • sort() modifies the original array, while rsort() returns a new sorted array.
  • sort() and rsort() have the same functionality.
The correct option is 1. The main difference between sort() and rsort() in PHP is the order in which they sort the array. The sort() function arranges the elements of an array in ascending order, while the rsort() function sorts the elements in descending order. Both functions work on indexed arrays, not specifically on associative arrays. Additionally, both sort() and rsort() modify the original array directly, rather than returning a new sorted array. Understanding the difference between these functions is important for selecting the appropriate sorting method based on the desired order of the array elements. Learn more: https://www.php.net/manual/en/function.sort.php, https://www.php.net/manual/en/function.rsort.php
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The filter_input_array() function is used to get multiple input values and optionally filter them in PHP.

  • filtered
  • input
  • sanitized
  • validated
The filter_input_array() function in PHP is used to get multiple input values and optionally filter them. It allows you to specify the type of input and the filter to apply. For more details, refer to: http://php.net/manual/en/function.filter-input-array.php
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The for loop in PHP tests the condition ______ executing the block of code.

  • Before
  • After
  • While
  • During
The for loop in PHP tests the condition before executing the block of code. It first evaluates the condition and if it is true, it executes the code block. If the condition is false, the loop is not executed, and the program continues to the next statement after the loop. This allows you to control the execution of the loop based on the condition. Learn more: https://www.php.net/manual/en/control-structures.for.php
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You are writing a PHP script and you need to store multiple values in a single variable for easy manipulation. How would you do this using an array?

  • Declare a series of variables with the same name.
  • Use the concatenate operator to combine values.
  • Use a single variable to store the values as a comma-separated string.
  • Use an array to store the values as elements within the array.
To store multiple values in a single variable for easy manipulation, you would use an array in PHP. An array allows you to store multiple values of different data types in a structured manner. Each value is assigned an index or key, allowing for easy access and manipulation. Arrays provide flexibility and convenience for working with collections of data in PHP. Learn more: https://www.php.net/manual/en/language.types.array.php
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What PHP function can be used to read a file?

  • readfile()
  • file_get_contents()
  • fread()
  • open()
The fread() function in PHP is used to read a file. It takes the file pointer and the number of bytes to read as arguments and returns the content of the file as a string. Alternatively, file_get_contents() can also be used to read the entire contents of a file into a string.
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The filter_input_array() function in PHP is used to get the ______ values and optionally filter them.

  • filtered
  • input
  • sanitized
  • validated
The filter_input_array() function in PHP is used to get the input values and optionally filter them. It allows you to specify the type of input and the filter to apply. For more details, refer to: http://php.net/manual/en/function.filter-input-array.php
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The $GLOBALS superglobal in PHP is an associative array.

  • TRUE
  • FALSE
The correct option is 1. The $GLOBALS superglobal in PHP is indeed an associative array. It contains references to all global variables currently defined in the global scope of the script. The keys of the $GLOBALS array are the variable names, and the values are references to the corresponding variables. This allows you to access and manipulate global variables from anywhere within the script using the $GLOBALS superglobal. However, it is important to note that modifying the values of global variables directly through the $GLOBALS superglobal can lead to potential issues and make code harder to maintain. It is generally recommended to minimize the use of global variables and follow good coding practices. Learn more: https://www.php.net/manual/en/reserved.variables.globals.php
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Which of the following are true about the elseif statement in PHP?

  • It allows you to specify a new condition to be tested if the preceding if and elseif conditions are false
  • It can only be used as the last condition in a sequence of conditions
  • It can be used without an if statement
  • It can test only string values
The elseif statement in PHP allows you to specify a new condition to be tested if the preceding if and elseif conditions are false. It provides an additional alternative to be checked after the initial if condition is false. The elseif statement can be used multiple times within a sequence of conditions to test different conditions sequentially. It is often used in conjunction with if and else statements to handle complex decision-making logic. The elseif statement is not limited to testing specific data types and can evaluate any valid condition. Learn more: https://www.php.net/manual/en/control-structures.elseif.php
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You have a PHP script and you need to read a file. How would you do this?

  • open the file using fopen() and read its contents using fread()
  • use the file_get_contents() function to read the entire file into a string
  • use the file() function to read the file line by line into an array
  • use the readfile() function to output the contents of the file directly
To read a file in a PHP script, you would typically open the file using the fopen() function to obtain a file handle. Then, you can use the fread() function to read the content of the file in chunks or specific byte sizes. Alternatively, you can use functions like file_get_contents() to read the entire file into a string or file() to read the file line by line into an array.
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Which of the following are differences between variables and constants in PHP?

  • Variables can be changed during the execution of the script, while constants cannot
  • Variables are case-sensitive, while constants are case-insensitive
  • Variables need to be explicitly declared using the $ sign, while constants do not need explicit declaration
  • All of the above
All of the above options are differences between variables and constants in PHP. Variables in PHP can have their values changed during the execution of the script, whereas constants are fixed and cannot be modified once defined. Variables are case-sensitive, meaning that different cases of the same variable name are treated as separate entities. On the other hand, constants are case-insensitive, allowing for consistent access regardless of the case used. Variables need to be explicitly declared using the $ sign, while constants do not require explicit declaration statements. Learn more: https://www.php.net/manual/en/language.variables.basics.php https://www.php.net/manual/en/language.constants.php
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