php正则表达式匹配函数

<?php function show($var=null){

if(empty($var))  {

echo ‘null‘;

}else if(is_array($var) || is_object($var)){

echo ‘<pre>‘;

print_r($var);

echo ‘</pre>‘;

}else{

echo $var;

}

}

$pattern=‘/[0-9]/‘;

$subject=‘asd78dfgfd1dfg2asdf8sadf6asdf9‘;

$m1=$m2=array();

$t1=preg_match($pattern,$subject,$m1);//返回匹配的次数，这个函数只匹配一次

$t2=preg_match_all($pattern,$subject,$m2);//返回匹配的次数，这个函数只匹配多次

show($m1);

echo ‘<hr/>‘;

show($m2);

echo ‘<hr/>‘;

show($t1.‘||‘.$t2);