Title of the document

bienvenue sur l'interface de paiement payment gateway https://stackoverflow.com/questions/18121749/how-to-generate-a-unique-transaction-id-in-a-shopping-cart session_destroy(), session_unset() pour accéder à la variable echo $_COOKIE["langage"]; // Sortie: php https://www.w3schools.com/howto/howto_css_switch.asp https://www.devenir-webmaster.com/V2/TUTO/CHAPITRE/HTML-CSS/25-le-centrage-css/ https://www.w3schools.com/css/css_align.asp https://adsume.com/your-file-is-loading-please-wait/ a voir https://juliencrego.com/astuces/exemples-dinterfaces-web-construites-avec-une-grille-css/ https://juliencrego.com/cours/css-et-la-disposition-en-grille-ou-grid-layout/ https://www.quackit.com/css/grid/examples/css_grid_website_layout_examples.cfm https://www.quackit.com/html/ .mybox { width: 100px; height: 100px; border: 5px solid #FFFFFF; background-color: #FF0000; } HTML

https://blog.hubspot.com/website/center-div-css#:~:text=In%20your%20HTML%2C%20add%20a,set%20vertical%2Dalign%20to%20middle. https://la-cascade.io/articles/centrer-une-div-guide-complet

I am vertically and horizontally centered.

I am vertically centered

https://www.w3docs.com/snippets/css/how-to-vertically-center-text-with-css.html super