pw_image_rename2.php

<?php

// stripped down code

$old_name = 'lizard.jpg';
$new_name = 'wizard';

$p = $pages->find("image.data=$old_name")->first();

$p->of(false); // outputformatting off, single and multiple image fields are from now on wire array's
$img        = $p->image->find("name=$old_name")->first();
$new_img    = $p->image->path . $new_name .".". $img->ext;

// copy and rename
copy($img->filename, $new_img);

// remove old, add new image to page
$p->image->remove($img); // orig, will get deleted
$p->image->add($new_img); // new
$p->save();

pw_image_rename3.php

<?php

// yet another example using PW pagefile->rename()

$old_name = 'wizard.jpg';
$new_name = 'lizard';

$p = $pages->get("image.data=$old_name");
$p->of(false); // outputformatting off, single and multiple image fields are from now on wire array's

// get the image and the extension
$image          = $p->image->find("name=$old_name")->first();
$ext            = $image->ext;

$newFilename    = $new_name . "." . $ext;

$p->image->trackChange("basename");
$image->removeVariations();
$image->rename($newFilename);

$p->save("image");

pw_rename_image.php

<?php

$old_name = 'lizard.jpg';
$new_name = 'wizard';

$p = $pages->find("image.data=$old_name")->first();
$p->of(false); // outputformatting off, single and multiple image fields are from now on wire array's

$path           = $p->image->path;
$page_image     = $p->image->find("name=$old_name")->first(); // find the image 
$ext            = $page_image->ext;
$orig_image     = $page_image->filename
$new_image      = $path . $new_name . "." . $ext;

echo "orig: " . $orig_image . "<br/>";
echo "path: " . $path . "<br/>";
echo "ext: " . $ext . "<br/>";
echo "new: " . $new_image . "<br/>";

// copy and rename
copy($orig_image, $new_image);

// remove old, add new image to page
$p->image->remove($page_image); // orig, will get deleted
$p->image->add($new_image); // new
$p->save();