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PHP Regular Expressions

PHP Regular Expressions
How many functions does PHP offer for searching strings using POSIX style regular expression?

8
7
9
10

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PHP Regular Expressions
Which one of the following functions can be used to concatenate array elements to form a single delimited string?

concat()
concatenate()
implode()
explode()

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PHP Regular Expressions
Which one of the following regular expression matches any string containing zero or one p?

p*
P?
p+
p#

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PHP Regular Expressions
What will be the output of the following PHP code?
$foods = array("pasta", "steak", "fish", "potatoes");
$food = preg_grep("/^s/", $foods);
print_r($food);

Array ( [1] => steak )
Array ( [0] => pasta [1] => steak [2] => fish [3] => potatoes )
Array ( [3] => potatoes )
Array ( [0] => potatoes )

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PHP Regular Expressions
Which one of the following functions finds the last occurrence of a string, returning its numerical position?

strlastpos()
strpos()
strlast()
strrpos()

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PHP Regular Expressions
Which one of the following preg PHP function is used to do a find and replace on a string or an array?

preg_replace()
preg_findre()
preg_find_replace()
preg_find()

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