Woocommerce - Set Minimum quantity for products in cart

Restricting user to buy minimum quantity for products in woo-commerce is a pretty cool thing, we can achieve it by following the below steps

Step1:

1. Collect the product ids for which you wanted to restrict the quantity during checkout, store them in a array

<?php

$pd_min_quantity= array( 

array( 'id' => 3587, 'min' => 99),

array( 'id' => 2554, 'min' => 87),

array( 'id' => 5587, 'min' => 52),

array( 'id' => 4488, 'min' => 40),

       array( 'id' => 2555, 'min' => 80),

);

?>

Step2:

Add Following code to your themes - > functions.php

Note: don't forget to update your product ids and quantity 

<?php

add_action( 'woocommerce_check_cart_items', 'restrict_product_quantity' );

function restrict_product_quantity() {

if( is_cart() || is_checkout() ) {

global $woocommerce;

$pd_min_quantity= array(

array( 'id' => 3587, 'min' => 99),

array( 'id' => 2554, 'min' => 87),

array( 'id' => 5587, 'min' => 52),

array( 'id' => 4488, 'min' => 40),

       array( 'id' => 2555, 'min' => 80),

);

$i = 0;

$odd_prod = array();

foreach( $woocommerce->cart->cart_contents as $pd_cart ) {

foreach( $pd_min_quantity as $pd_quantity ) {

if( $pd_quantity['id'] == $pd_cart['product_id'] ) {

if( $pd_cart['quantity'] < $pd_quantity['min'] ) {

$odd_prod[$i]['id'] = $pd_cart['product_id'];

$odd_prod[$i]['in_cart'] = $pd_cart['quantity'];

$odd_prod[$i]['min_req'] = $pd_quantity['min'];

}

}

}

$i++;

}

if( is_array( $odd_prod) && count( $odd_prod ) > 1 ) {

$message = '<strong>Minimum quantity per product should be added.</strong><br />';

foreach( $odd_prod as $odd_prods ) {

$message .= get_the_title( $odd_prods['id'] ) .' requires a minimum quantity of '

. $odd_prods['min_req'] 

.'. You currently have: '. $odd_prods['in_cart'] .'.<br />';

}

wc_add_notice( $message, 'error' );

}

}

}

?>

Step3:

Done!!