hoe maak ik een textarea met fopen?

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Hoe maak ik een met een "zend" knop dat een ander file aanpast?<br/>Ik weet dat dit met fopen gaat maar me ervaring is daar niet al te groot in.<br/>Hopelijk kunnen jullie me helpen.<br/><br/>Met vriendelijke groeten,<br/><br/>Bradley </p> <div class="h-[calc(0.75rem_-_1px)] relative text-gray-300 !mt-2 sm:!mt-3"> <div class="absolute left-0 h-[0.75rem] w-[calc(7%_+_1px)] border-b border-current"></div> <div class="absolute left-[7%] bottom-0 h-[0.75rem] w-[0.75rem] border-t border-l border-current rotate-45 translate-y-[calc(0.375rem)] translate-x-[calc(0.155rem_+_1px)]" > </div> <div class="absolute right-0 h-3 w-[calc(93%_-_1.06rem)] border-b border-current"></div> </div> <div> <div class="stack-x space-x-3 justify-between | text-xs "> <div class="stack-x space-x-3 sm:space-x-4"> <span class="icon default-avatar | w-10 h-10 text-current"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 1000 1000"><path d="M599.8 375.6c-10.2 0-22.6 2.5-37.1 5.3-18.7 3.8-39.9 8-62.8 8-22.8 0-44-4.2-62.7-8-14.4-2.8-26.8-5.3-37-5.3-11.9 0-28.3 0-28.3 51.1 0 85.7 39.6 172.1 128 172.1S628 512.4 628 426.7c.1-51.1-16.3-51.1-28.2-51.1zM500 557.2c-44.2 0-57.2-42.9-57.2-42.9h114.3c.1 0-12.9 42.9-57.1 42.9zm-65.5 48v71.1c39.2 17.9 84.6 17.8 123.6 0v-67.1c-17.6 8.4-37 13.2-58.1 13.2-24.1 0-46-6.3-65.5-17.2z"/><path d="M500 10C229.4 10 10 229.4 10 500s219.4 490 490 490 490-219.4 490-490S770.6 10 500 10zM264.6 757.3s51.8-55.6 146.4-80.1v-43.6h-79.1c0-137.9-19.5-160.8-19.5-206.9 0-101.5 61.8-183.9 187.6-183.9 125.7 0 187.6 82.4 187.6 183.9 0 49.1-19.4 72.5-19.4 206.9h-86.6v41.9c99.1 23.5 153.8 81.8 153.8 81.8H264.6z"/></svg></span> <div class="stack-y space-y-0 justify-center"> <div class="text-wrap"> <span class="italic text-current opacity-70">Verwijderde gebruiker</span> <span class="!ml-1"> </span> </div> <div class="opacity-light"> 11 jaar geleden </div> <div> <span class="opacity-light">in: </span> <a href="/v/computers-internet/programmeren/" class="text-primary">Programmeren</a> </div> </div> </div> <div class="stack-x items-center | min-w-fit last:children:!-mr-2.5"> <div class="stack-x space-x-2.5 | min-w-fit text-xs text-gray-600 p-2.5"> <div class="inline-block sm:hidden"> <span>10.9K</span> </div> <div class="hidden sm:inline-block !ml-0"> <span> 10.9K keer bekeken </span> </div> <span aria-hidden="true" class="icon aligned inline-block icon-2.5xl" > <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" style="fill:none;stroke:currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.2" d="M15 12a3 3 0 1 1-6 0 3 3 0 0 1 6 0z"/><path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.2" d="M2.458 12C3.732 7.943 7.523 5 12 5c4.478 0 8.268 2.943 9.542 7-1.274 4.057-5.064 7-9.542 7-4.477 0-8.268-2.943-9.542-7z"/></svg> </span> </div> <button class="block-footer-button min-w-fit children:active:opacity-80" x-on:click="commentsOpened=!commentsOpened ; $dispatch('comments-open', commentsOpened)" > <div class="stack-x space-x-2.5"> <span class="hidden sm:inline-block"> 0 </span> <span class="inline-block sm:hidden !ml-0"> 0 </span> <span aria-hidden="true" class="icon aligned inline-block icon-2.5xl cursor-pointer" > <svg xmlns="http://www.w3.org/2000/svg" style="fill:none;stroke:currentColor" width="24" height="24" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" d="M21 12c0 4.418-4.03 8-9 8a9.862 9.862 0 0 1-4.255-.95L3 20l1.395-3.72C3.512 15.042 3 13.574 3 12c0-4.418 4.03-8 9-8s9 3.582 9 8Z"/></svg> </span> </div> </button> <div class="relative !-ml-2.5" x-data="Dropdown" @keydown.escape.prevent.stop="close($refs.button)" @focusin.window="! 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Reageer dan hier. </p> <div class="mb-1" id="addComment"> <div class="stack-x space-x-3 items-center | relative" x-data="AddComment" > <div class="min-w-fit"> <img class="w-10 h-10 rounded-full" aria-hidden="true" :src="UserInfo.avatarUrl" x-show="UserInfo.avatarUrl" > <span class="icon default-avatar | w-10 h-10 text-current" x-show="!UserInfo.avatarUrl" > <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 1000 1000"><path d="M599.8 375.6c-10.2 0-22.6 2.5-37.1 5.3-18.7 3.8-39.9 8-62.8 8-22.8 0-44-4.2-62.7-8-14.4-2.8-26.8-5.3-37-5.3-11.9 0-28.3 0-28.3 51.1 0 85.7 39.6 172.1 128 172.1S628 512.4 628 426.7c.1-51.1-16.3-51.1-28.2-51.1zM500 557.2c-44.2 0-57.2-42.9-57.2-42.9h114.3c.1 0-12.9 42.9-57.1 42.9zm-65.5 48v71.1c39.2 17.9 84.6 17.8 123.6 0v-67.1c-17.6 8.4-37 13.2-58.1 13.2-24.1 0-46-6.3-65.5-17.2z"/><path d="M500 10C229.4 10 10 229.4 10 500s219.4 490 490 490 490-219.4 490-490S770.6 10 500 10zM264.6 757.3s51.8-55.6 146.4-80.1v-43.6h-79.1c0-137.9-19.5-160.8-19.5-206.9 0-101.5 61.8-183.9 187.6-183.9 125.7 0 187.6 82.4 187.6 183.9 0 49.1-19.4 72.5-19.4 206.9h-86.6v41.9c99.1 23.5 153.8 81.8 153.8 81.8H264.6z"/></svg> </span> </div> <form id="addCommentForm" method="post" action="/v/programmeren/465637/textarea-fopen/comment/" class="grow stack-x space-x-2 items-center" x-ref="form" > <textarea name="text" placeholder="Voeg een reactie toe..." maxlength="5000" rows="1" class="grow ml-1 h-9 w-40 py-1.5 border border-gray-300 rounded-md overflow-hidden" x-validate.silent="required, minLength:10" x-auto-grow> Voeg reactie toe