如何判断字符串是否为纯字母
Posted void9main
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function checkStrIsLetter($str){
$letteraArr = array("a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z");
$letterAArr = array("A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"," ");
//字母表
$letter = array_merge($letteraArr,$letterAArr);
//分割字符
$strArr = str_split($str);
//循环判断
if(!empty($strArr)){
foreach($strArr as $key=>$val){
if(!in_array($val,$letter)){
return "no";
exit;
}
}
}else{
return "no";
}
return "yes";
}
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