wordpress functions

gistfile1.php

<?php
/**
 * Useful Wordpress Functions
 */

function first_img($id) {
  $files = get_children('post_parent='.$id.'&post_type=attachment&post_mime_type=image');
  if($files) :
    $keys = array_reverse(array_keys($files));
    $j=0;
    $num = $keys[$j];
    $image=wp_get_attachment_image($num, 'large', false);
    $imagepieces = explode('"', $image);
    $imagepath = $imagepieces[1];
    $thumb=wp_get_attachment_thumb_url($num);
    return $thumb;
  endif;
}


function acf_img($field, $size){
	$ret = get_field($field); 
	return $ret ? $ret['sizes'][$size] : false;
}

function wp_img($postID, $size){
	$ret = wp_get_attachment_image_src($postID, $size);
	return $ret[0];
}

function map_method($array, $methodName) {
	if(!$array) array();
	$returnCode = 'return $a->'. $methodName.';';
	return(array_map(create_function('$a', $returnCode), $array));
}

?>