February 5, 2012

【PHP】限制字數 (strlen搭配substr用法)

$a=$_POST["test"];
if(strlen($a)>5){
如果$a的長度超過5(中文一個字的長度是3,英文長度是1)
$a=substr($a,0,5);
取$a第0個字到第5個字
}

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