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WordPress Content Functions

These are the pre-define function defined in wordpress we just need to use 
it directly where we wanted.
the most common functions we normally use is get title , get site url etc.
So basically  these are for beginners  and you become expert while regular using this.
there are comment with every function to explain its functionality. 

// title of the post

<?php the_title(); ?>

// web site url 

<?php echo site_url(); ?>

// web site name 

<?php echo get_bloginfo(); ?>

// post body 

if ( have_posts() ) : the_post();

// get custom value of the post

$cusomVal = get_post_custom_values('name_of_custom_value', $post->ID);
echo $cusomVal[0] ;

// get post thumbnail 

<?php the_post_thumbnail(); ?>

// get thumbnail url

$post_thumbnail_id = get_post_thumbnail_id($post->ID);
$post_thumbnail_url = wp_get_attachment_url( $post_thumbnail_id );

// post per page attributes (give the required number of post on the page)
  $args = array( 'posts_per_page' => 5, 'offset'=> 0 );
  $myposts = get_posts( $args );

// limited post text on the page (put this on the place the_content())and add ellipse in the end

<?php the_excerpt(); ?>

// get published date 
<?php echo get_the_date(); ?>


Custom file Upload in (spicifiec directory) WordPress

$dir = wp_upload_dir();

$target_dir = $dir['basedir'] .'/';

$target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);

if(move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file))
    $url = $dir['baseurl'].basename($_FILES["fileToUpload"]["name"]);

//  update if want to update image 

    update_user_meta( $user_id, 'upload_field', $url);

<form  action="" method="post" enctype="multipart/form-data">

<input type="file" name="fileToUpload" id="fileToUpload">

<input type="submit" name="uploade" value="Uplaode Image" />