(PHP 5 >= 5.2.0, PHP 7, PHP 8, PECL zip >= 1.1.0)
ZipArchive::getFromName — Returns the entry contents using its name
$name, int $len = 0, int $flags = 0): string|falseReturns the entry contents using its name.
nameName of the entry
len
       The length to be read from the entry. If 0, then the
       entire entry is read.
      
flagsThe flags to use to find the entry. The following values may be ORed.
          ZipArchive::FL_UNCHANGED
         
          ZipArchive::FL_COMPRESSED
         
          ZipArchive::FL_NOCASE
         
   Returns the contents of the entry on success or false on failure.
  
Example #1 Get the file contents
<?php
$zip = new ZipArchive;
if ($zip->open('test1.zip') === TRUE) {
    echo $zip->getFromName('testfromfile.php');
    $zip->close();
} else {
    echo 'failed';
}
?>
Example #2 Convert an image from a zip entry
<?php
$z = new ZipArchive();
if ($z->open(dirname(__FILE__) . '/test_im.zip')) {
    $im_string = $z->getFromName("pear_item.gif");
    $im = imagecreatefromstring($im_string);
    imagepng($im, 'b.png');
}
?>