php產生隨機字串(自訂純數字、純字母或數字字母混合)

//產生隨機字串 function rand_zifu($what,$number){ $string=''; for($i = 1; $i <= $number; $i++){ //混合 $panduan=1; if($what == 3){ if(rand(1,2)==1){ $what=1; }else{ $what=2; } $panduan=2; } //數字 if($what==1){ $string.=rand(0,9); }elseif($what==2){ //字母 $rand=rand(0,24); $b='a'; for($a =0;$a <=$rand;$a++){ $b++; } $string.=$b; } if($panduan==2)$what=3; } return $string; } echo rand_zifu(3,10); 複製代碼

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