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In PHP, the ______ statement can output one or more strings.

  • echo
  • print
  • printf
  • display
In PHP, the echo statement can output one or more strings. It is commonly used to display strings and variables. You can use echo to output plain text, HTML code, or a combination of both. Multiple strings can be concatenated with the dot (.) operator within the echo statement. Learn more: https://www.php.net/manual/en/function.echo.php
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What functions does PHP provide for sorting arrays?

  • sort() and rsort()
  • shuffle() and reverse()
  • merge() and split()
  • sum() and count()
PHP provides the sort() and rsort() functions for sorting arrays. The sort() function arranges the elements of an array in ascending order, while the rsort() function sorts the elements in descending order. These functions work directly on the array and modify its order. Sorting arrays is a common operation in PHP, and these functions provide a convenient way to organize and rearrange array elements based on their values. Learn more: https://www.php.net/manual/en/array.sorting.php
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What are some commonly used network functions in PHP?

  • file_get_contents(), curl_init(), fsockopen()
  • mysqli_query(), pdo_query(), execute_query()
  • json_encode(), json_decode(), json_last_error()
  • All of the above
Some commonly used network functions in PHP include file_get_contents(), curl_init(), and fsockopen(). The file_get_contents() function is used to establish an HTTP connection and fetch the content of a web page. The curl_init() function provides more advanced features for handling HTTP requests, including support for various protocols and options. The fsockopen() function allows low-level socket programming for network communication. These functions enable PHP to interact with remote servers, retrieve data from APIs, perform HTTP requests, and handle network-related tasks.
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What function do you use in PHP to send an email?

  • mail()
  • sendmail()
  • smtp_send()
  • All of the above
In PHP, you can use the mail() function to send an email. The mail() function takes several parameters, including the recipient's email address, the email subject, the email message body, and optional headers. For example, mail($to, $subject, $message, $headers); sends an email using the specified parameters. The mail() function internally uses the underlying mail server configuration to send the email. It is a built-in function in PHP specifically designed for sending emails.
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In PHP, a callback function is a function that is passed as an argument to ______.

  • Another function
  • A class method
  • An event handler function
  • All of the above
In PHP, a callback function is a function that is passed as an argument to another function. It allows the receiving function to call the callback function at a later point in the code. Callback functions are commonly used in PHP for various purposes, such as event handling, dynamic function invocation, and more. The correct option is "Another function" as it covers the general use case of callback functions in PHP. For further information, consult the PHP documentation on callback functions: http://php.net/manual/en/language.types.callable.php
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Which PHP function checks if a variable is a number or a numeric string?

  • is_numeric()
  • is_integer()
  • is_float()
  • is_string()
The is_numeric() function in PHP is used to check if a variable is a number or a numeric string. It returns true if the variable can be evaluated as a number, whether it is an integer or a float, or a numeric string. This function is useful when you need to validate the numeric nature of a variable. Learn more: https://www.php.net/manual/en/function.is-numeric.php
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You need to extract a part of a string in your PHP script. How would you do this using Regular Expressions in PHP?

  • Use the preg_match() function with capturing groups in the Regular Expression pattern.
  • Use the strtolower() function to convert the string to lowercase.
  • Use the substr() function to extract the desired part of the string.
  • Use the is_string() function to check if the value is a string.
To extract a part of a string using Regular Expressions in PHP, you can use the preg_match() function with capturing groups in the Regular Expression pattern. By defining capturing groups within the Regular Expression pattern, you can specify the part of the string you want to extract. When a match is found, the preg_match() function will populate an array with the captured groups. You can then access the desired part of the string using the appropriate index in the array. This allows you to extract specific portions of a string based on a pattern defined by a Regular Expression. Learn more: https://www.php.net/manual/en/function.preg-match.php
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The $_GET superglobal in PHP is an associative array.

  • TRUE
  • FALSE
The statement is true. In PHP, the $_GET superglobal is indeed an associative array. It contains key-value pairs where the keys represent the parameters or names of the variables passed through the URL's query string, and the corresponding values are the data associated with those keys. You can access this data using the $_GET['parameter'] syntax, where 'parameter' is the name of the key. Learn more: https://www.php.net/manual/en/reserved.variables.get.php
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You are debugging a PHP script and a variable is not retaining its value between function calls. What might be the problem and how would you solve it?

  • The variable is declared as a local variable inside the function.
  • The variable is declared with the static keyword inside the function.
  • The variable is declared as a global variable outside of any function.
  • The variable is not properly initialized or assigned values.
If a variable is not retaining its value between function calls, the possible problem might be that the variable is declared with the static keyword inside the function. The static keyword makes the variable retain its value between multiple calls to the same function. To solve this, you can remove the static keyword if the variable doesn't need to retain its value. Alternatively, if the variable should retain its value, make sure it is properly initialized and assigned values. Learn more: https://www.php.net/manual/en/language.variables.scope.php#language.variables.scope.static
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To access an element of an associative array in PHP, you use the name of the array followed by the ______ of the element in square brackets.

  • Key
  • Value
  • Index
  • Identifier
To access an element of an associative array in PHP, you use the name of the array followed by the key of the element in square brackets ([]). The key represents the string identifier associated with the element. By specifying the key within the square brackets, you can retrieve the corresponding value of the element. Associative arrays provide a convenient way to store and retrieve data using meaningful labels or identifiers. Learn more: https://www.php.net/manual/en/language.types.array.php#language.types.array.syntax
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