how to find if this string :
132,139,150,166,176
is in this one? :
132,139,150,166,176,131,140,151,165,175
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12To raise the chance people will help you, it's advised to accept some answers of your previous questions first.Wouter Dorgelo– Wouter Dorgelo2010-11-22 16:26:46 +00:00Commented Nov 22, 2010 at 16:26
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Just wondering, why would this specific pair of strings be any more special than any two random strings of data?Incognito– Incognito2010-11-22 16:42:32 +00:00Commented Nov 22, 2010 at 16:42
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2 Answers
You can use strpos function to find the occurrence of one string within another.
$str1 = '132,139,150,166,176,131,140,151,165,175';
$str2 = '132,139,150,166,176';
if( strpos($str1,$str2) !== false) {
// $str2 exists within $str1.
}
Note that strpos will return 0 if $str2 is found at the beginning of $str1 which in fact is the case above and will return false if not found anywhere.
You must use the identity operator !== which checks both value and type to compare the return value with false because:
0 !== false is true
where as
0 != false is false
Comments
You want strpos
strrpos("132,139,150,166,176,131,140,151,165,175","132,139,150,166,176");
If a string exists, its starting point will be returned from zero onward, if it is not present the result will be 'false'
1 Comment
Stephen
The OP seems to be new to PHP. You should clarify that he should use an identity operator over an equality operator when using
strrpos, to avoid pitfalls.