PHP-句子中的完全匹配字符串

Question

I have the following function to do a "exact match" of a pattern ($searchPat) in a sentence ($sourceStr)

function isUsed($sourceStr, $searchPat) {
 if (strpos($sourceStr, $searchPat) !== false) {
    return true;
    } else {
    return false;
    }
}

However, this doesn't do an exact match. I changed the function as follows but this doesn't even execute.

function isUsed($sourceStr, $searchPat) {
if (preg_match("~\b[$sourceStr]\b~", $searchPat)) {
    return true;
    } else {
    return false;
    }
}

How could I do an exact match please?

Answer 1

The [] is a character class. That lists characters you want to allow, for example [aeiou] would allow a vowel. Your variables are also in the inverted order, pattern first, then string to match against. Try this:

function isUsed($sourceStr, $searchPat) {
     if (preg_match("~\b$searchPat\b~", $sourceStr)) {
         return true;
     } else {
         return false;
     }
}

Additional notes, this is case sensitive, so Be won't match be . If the values you are passing in are going to have special characters the preg_quote function should be used, preg_quote($variable, '~') . You also may want to concatenate the variable so it is clear that that is a variable and not part of the regex. The $ in regex means the end of the string.

Answer 2

Try This.

function isUsed($sourceStr, $searchPat) {
if (preg_match("/\b".preg_quote($sourceStr)."\b/i", $searchPat)) {
    return true;
    } else {
    return false;
    }
}

Answer 3

Please try "preg_match" for matches.

$string = 'test';
if ( preg_match("~\btest\b~",$string) )
  echo "matched";
else
  echo "no match";

Or try like this

if(stripos($text,$word) !== false) 
      echo "no match";
    else
      echo "match";

Answer 4

You can try this one:

  function isUsed($string_to_search, $source_String) {
    if (preg_match("/$string_to_search/", $source_String)) {
    return true;
    } else {
     return false;
    }
 }

You can change according to your need.

preg_match("/$string_to_search/i", $source_String)
preg_match("/\\b$string_to_search\\b/i", $source_String)
if you have any special characters in your string for your safe side replace it with '\\special_character'