【php】读文件找出特定字符

来源：互联网发布：知乎mba课程设置编辑：程序博客网时间：2024/04/29 11:13
<?phpfunction aType($x){$tmp = ord($x);if($tmp>=97 && $tmp<=122){return 0;//}if($tmp >=65 && $tmp <=90){return 1;}return 2;}$fin=fopen("5M.txt","r");$end=microtime(true);//$count=0;$a=array();$b='';$c=0;while(!feof($fin)){$tmp=fgetc($fin);if(trim($tmp)=='')continue;$type= aType($tmp);if(count($a)==0&&$b==''&&$c==0){if($type==0){$a[0]=$tmp;}else{}}elseif(count($a)==1&&$b==''&&$c==0){if($type==0){$a[0]=$tmp;$b='';$c=0;}else{ $b=$tmp;$c+=1;}}elseif(count($a)==1&&!empty($b)&&$c==1){if($type==0){$a[0]=$tmp;$b='';$c=0;}else{if($tmp==$b)$c+=1;else{$a=array();$b='';$c=0;}}}elseif(count($a)==1&&!empty($b)&&$c==2){if($type==0){$a[0]=$tmp;$b='';$c=0;}else{if($tmp==$b)$c+=1;else{$a=array();$b='';$c=0;}}}elseif(count($a)==1&&!empty($b)&&$c==3){if($type==0){$a[1]=$tmp;}else{$a=array();$b='';$c=0;}}elseif(count($a)==2&&!empty($b)&&$c==3){if($type==0){$a=array();$a[0]=$tmp;$b='';$c=0;}else{if($tmp==$b)$c+=1;else{array_shift($a);$b=$tmp;$c=1;}}}elseif(count($a)==2&&!empty($b)&&$c==4){if($type==0){$a=array();$b='';$c=0;}else{if($tmp==$b)$c+=1;else{$a=array();$b=$tmp;$c=1;}}}elseif(count($a)==2&&!empty($b)&&$c==5){if($type==0){$a=array();$b='';$c=0;}else{if($tmp==$b)$c+=1;else{$a=array();$b=0;$c=0;}}}elseif(count($a)==2&&!empty($b)&&$c==6){if($type==0){$a[2]=$tmp;array_shift($a);echo $a[0];$c=3;}else{$a=array();$b=0;$c=0;}}    } fclose($fin);$end_find=microtime(true);echo "<br/>";echo "parse file time=";echo $end_find-$end;echo "<br/>";echo "<br/>";
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