<?php header("Content-type: text/html; charset=utf-8"); $data = " PHP : Hypertext Preprocessor "; //もとの文字を出力 echo "|" . $data . "|長さ" . strlen($data) . "<br>"; //半角スペースを長さ0の文字列に置換 $data = str_replace(" ", "",$data); echo "|" . $data . "|長さ" . strlen($data) . "<br>"; ?>