What is the best way to check whether string $a contains string $b [duplicate]

This question already has answers here: Closed 11 years ago. 开发者_C百科

Possible Duplicate:

See if one string contains another string

I have a string each word separated by ","

$a="apple,pear,peach";

$b='apple';

What is the best way to check whether string $a contains string $b

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If $b will not contain , use strpos:

if (false !== strpos($a, $b)) {
  // $a contains $b
}

otherwise you can use:

if (in_array($b, explode(',', $a)) {
  // $a contains $b
}

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See strstr or strpos

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strpos($a, $b) !== false

Only way I know.

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if (strpos($a, $b) !==false) { $a contains $b }

http://www.php.net/manual/en/function.strpos.php

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Use regular expressions. http://php.net/manual/en/function.preg-match.php