PHP

get field acf

$content = get_field('content', $post_id);

acf get field

<?php echo get_field( "text_field" );?>

acf get field

get_field($selector, [$post_id], [$format_value]);
/*
$selector (string) (Required) The field name or field key.
$post_id (mixed) (Optional) The post ID where the value is saved. Defaults to the current post.
$format_value (bool) (Optional) Whether to apply formatting logic. Defaults to true.
*/
// Get a value from the current post
$value = get_field( "text_field" );
// Get a value from a specific post
$value = get_field( "field_name", $post_id );

acf get field

$value = get_field( "text_field" );

if( $value ) {
    echo $value;
} else {
    echo 'empty';
}

get field object acf

get_field_object('content', post_id);

acf the_field

<?php $text_field = get_field( "text_field" ); ?>
<h2><?php echo $text_field; ?></h2>

acf the_field get a value from different objects

$post_id = false;           // current post
$post_id = 123;             // post ID = 123
$post_id = "user_123";      // user ID = 123
$post_id = "term_123";      // term ID = 123
$post_id = "category_123";  // same as above
$post_id = "option";        // options page
$post_id = "options";       // same as above

the_field( 'my_field', $post_id );