PHP中的字符串比较无法正常工作

Question

I am trying to open a file and compare each line to a string to see if they are same or not, but it's not working, here is the code.

$toSearch="moizhusnain@hotmail.com";
$textData=array();
$fla=FALSE;
$file=fopen('text.txt','r') or die('Unable to open file.');
while(!feof($file))
{
  $textData[]=fgets($file);
}
fclose($file);
for($i=0;$i<count($textData);$i++)
{
  echo $textData[$i]."<br/>";
  if (strcmp($toSearch,$textData[$i])==0)
  {
      echo "Yes";
  }
}

Answer 1

Try this

if (strcasecmp ($toSearch,$textData[$i])==0){ //case insensitive comparison
      echo "Yes";
}

Doc: http://php.net/manual/en/function.strcasecmp.php

Answer 2

What i have assumed and what code you have to do is given below:-

Assumption:-(your text file looks like this)

moizhusnain@hotmail.com
dfgfdgmoizhusnain111@hotmail.com
moidgdfdffdgzhusnain@hotmail.com
moizdsfdsfdsdfhusnain@hotmail.com

So code should be:-

<?php
error_reporting(E_ALL);
ini_set('display_errors',1);
$toSearch="moizhusnain@hotmail.com";
$textData = file('text.txt',FILE_IGNORE_NEW_LINES); // use file() function with ignoring new lines of your text file

echo "<pre/>";print_r($textData); // print array
foreach($textData as $textDat){ // use foreach() rather than for() loop
  if ($toSearch == $textDat){
    echo "Yes";
  }
}
?>

Reference:-

http://php.net/manual/en/function.file.php

Note:- If this works for you that simply means that new lines of your text-file are restricting your code to work as well as strcmp() is not needed actually.

Answer 3

While jonju has made a working example that fixes the problem using another approach, it can be fixed with the existing code, merely by using this RegEx ( stolen from here )

$string = trim(preg_replace('/\s\s+/', ' ', $string));

The following code works:

<?php
$toSearch="moizhusnain@hotmail.com";
$textData=array();
$fla=FALSE;
$file=fopen('text.txt','r') or die('Unable to open file.');
while(!feof($file))
{
  $textData[]=trim(preg_replace('/\s\s+/', ' ', fgets($file)));;
}
fclose($file);
for($i=0;$i<count($textData);$i++)
{

    if (strcmp($toSearch,$textData[$i])==0)
    {
        echo "Yes";
    }
}
?>