$str = "12345t m89"; //tºÍmÖ®¼äÓÐ3¸ö¿Õ¸ñ
$str = preg_replace("/ /","",$str);
echo $str;
$str = preg_replace("/ /","",$str);
echo $str;
<?php
$str = "12345t m89"; //t和m之间有3个空格
$str = preg_replace("/ /","",$str);
echo $str;
?>
上例可能表达的不清楚,再举一例:
<?php
$str = "123 45t m89"; //t和m之间有3个空格
$str = preg_replace("/t(这里怎么写?)m/","hehe",$str);
echo $str;
?>
希望得到:123 45hehe89.
$str = "123 45t m89"; //t和m之间有3个空格
$str = preg_replace("/t[\s]+m/","hehe",$str);
echo $str;
?>