Zend Preparation | PHP Quiz (Learning Mode)

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Which of the following functions will you use to break a string into an array based on a specific pattern?
Each correct answer represents a complete solution. Choose all that apply.

strstr()

preg_split()

explode()

implode()

Answer options B and C are correct.
Explanation:
You can use the preg_split() and explode() functions to break a string into an array based on a specific pattern.

preg_split() function
The preg_split() function is used to split the given string by a regular expression. The syntax of the preg_split() function is as follows:

array preg_split ( string $pattern, string $subject [, int $limit = -1 [, int $flags = 0 ]] )

explode() function
The explode() function is a PHP string function that takes a string and splits it into separate elements of an array, using the argument provided as delimiter. Its syntax is as follows:

 explode(separator,string,limit)

where separator specifies where to break the string, string is the string to split, limit specifies the maximum number of array elements to return.

Answer option D is incorrect. The implode() function traverses the elements of an array and recreates a single string using an argument. The syntax of the implode() function is as follows:

 implode(separator,array)

where the separator specifies what to put between the array elements, and array parameter is the array to join to a string.

Answer option A is incorrect. The strstr() function is used to test whether a string exists within another string. It needs a source string and a substring as an argument. The strstr() function returns false if the substring is absent. When the strstr() function exists, the strstr() function returns the portion of the source string beginning with the substring.