php - PHP、特定の単語を含む大きな文字列からすべての行を削除します

Question

$file = file_get_contents("http://www.bigsite.com");

$file「hello」という単語を含む文字列からすべての行を削除するにはどうすればよいですか?

Answer 1

$file = file_get_contents("http://www.bigsite.com");
$lines = explode("\n", $file);
$exclude = array();
foreach ($lines as $line) {
    if (strpos($line, 'hello') !== FALSE) {
         continue;
    }
    $exclude[] = $line;
}
echo implode("\n", $exclude);

Answer 2

$file = file_get_contents("http://www.example.com");

// remove sigle word hello
echo preg_replace('/(hello)/im', '', $file);

// remove multiple words hello, foo, bar, foobar
echo preg_replace('/(hello|foo|bar|foobar)/im', '', $file);

EDIT 行の削除

// read each file lines in array
$lines = file('http://example.com/');

// match single word hello
$pattern = '/(hello)/im';

// match multiple words hello, foo, bar, foobar
$pattern = '/(hello|foo|bar|foobar)/im';

$rows = array();

foreach ($lines as $key => $value) {
    if (!preg_match($pattern, $value)) {
        // lines not containing hello
        $rows[] = $line;
    }
}

// now create the paragraph again
echo implode("\n", $rows);

Answer 3

どうぞ：

$file = file('http://www.bigsite.com');

foreach( $file as $key=>$line ) {
  if( false !== strpos($line, 'hello') ) {
    unset $file[$key];
  }
}

$file = implode("\n", $file);