PHP uses regular expressions to extract the characters in the string in angle brackets, parentheses, brackets, curly braces _php Tutorial

PHP uses regular expressions to extract the characters in the string with angle brackets <>, parentheses (), brackets [], curly braces {} Descriptor examples, the friends you need can refer to the following

The code is as follows:

$str = "Hello <我> (Love) [Beijing]{Tiananmen Square}";

Echo F1 ($STR); Back to Hello

echo F2 ($STR); Return to my

echo f3 ($STR); Return to Love

echo f4 ($STR); Back to Beijing

echo f5 ($STR); Back to Tiananmen

Function F1 ($STR)

{

$result = Array ();

Preg_match_all ("/^ (. *) (?:<)/I", $str, $result);

return $result [1][0];

}

function F2 ($STR)

{

$result = Array ();

Preg_match_all ("/(?:<) (. *) (?:>)/I", $str, $result);

return $result [1][0];

}

function F3 ($STR)

{

$result = Array ();

Preg_match_all ("/(?: \ ()(.*)(?:\)) /i ", $str, $result);

return $result [1][0];

}

function F4 ($STR)

{

$result = Array ();

Preg_match_all ("/(?: \ [)(.*)(?:\]) /i ", $str, $result);

return $result [1][0];

}

function f5 ($STR)

{

$result = Array ();

Preg_match_all ("/(?: \ {)(.*)(?:\}) /i ", $str, $result);

return $result [1][0];

}

PS: (?: character) means that this character is not captured. It seems PHP does not support converting characters to parentheses.

Otherwise you can put a look into the nest, you can loop matching.

PS2: Surround: (?!) (?=) (?

There is a less than sign on the right side of the match, no match on the left. An exclamation point is unequal, and an equal sign represents equality.

PS3: Verified by authenticator, see Resources for Validator.

http://www.bkjia.com/PHPjc/750625.html www.bkjia.com true http://www.bkjia.com/PHPjc/750625.html techarticle PHP uses regular expressions to extract strings of angle brackets, parentheses (), brackets [], curly braces {} In the Word descriptor example, the need for friends can refer to the following code: $STR = Hello i (Love) [Beijing ...]

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