PHP Regex match sentences -


this question has answer here:

i trying compare 2 sentences using php , regex this:

$data = "i happy man 2 kids"; if (preg_match('/^(?=.*i)(?=.*am)(?=.*happy)(?=.*with)(?=.*2)(?=.*kids)/i', $data)) {echo 'match';} else {echo 'not match';}

and seems work fine, if change sentence to:

$data = "i happy man 20 kids"; if (preg_match('/^(?=.*i)(?=.*am)(?=.*happy)(?=.*with)(?=.*2)(?=.*kids)/i', $data)) {echo 'match';} else {echo 'not match';}

it's still saying matches. problem is not matching exact number , checking if theres number 2 on other sentence.

add word boundaries:

$data = "i happy man 20 kids"; if (preg_match('/^(?=.*i)(?=.*am)(?=.*happy)(?=.*with)(?=.*\b2\b)(?=.*kids)/i', $data)) { //                                                 here ___^^ ^^     echo 'match'; } else {     echo 'not match'; }

you may want add in each lookahead, regex become unredable

$data = "i happy man 20 kids"; if (preg_match('/^(?=.*\bi\b)(?=.*\bam\b)(?=.*\bhappy\b)(?=.*\bwith\b)(?=.*\b2\b)(?=.*\bkids\b)/i', $data)) {     echo 'match'; } else {     echo 'not match'; }

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