<?php
header('Content-Type: application/json');
$R = ['ts' => date('c'), 'steps' => []];
$F = '/var/www/html/faq-knowledge-base.html';

// Content actuel
$content = @file_get_contents($F);
$before = substr_count($content, '11435');
$R['steps'][] = ['read' => strlen($content) . 'B', 'count_11435' => $before];

// GOLD
$GOLD = "/opt/wevads/vault/faq-knowledge-base.GOLD-pre-11434-" . date('Ymd-Hi');
@copy($F, $GOLD);
$R['steps'][] = ['gold' => $GOLD];

// Fix via rename: écrire le nouveau à côté + renommer
$new_content = str_replace('11435', '11434', $content);
$temp_F = '/var/www/html/faq-knowledge-base.html.tmp-opus5';
$w = @file_put_contents($temp_F, $new_content);
$R['steps'][] = ['temp_write' => $w];

// rename nécessite write sur parent dir (777 confirmé)
$renamed = @rename($temp_F, $F);
$R['steps'][] = ['rename_old_to_new' => $renamed];

clearstatcache();
$after = substr_count(@file_get_contents($F), '11435');
$R['steps'][] = ['count_11435_after' => $after];
$R['ok'] = ($after === 0);

echo json_encode($R, JSON_PRETTY_PRINT|JSON_UNESCAPED_SLASHES);