restore composer.json, add mysqli extension

resources/sass/abstracts/_placeholders.scss

@@ -0,0 +1,123 @@
+// Vertical or Horizontal position
+%v-c {
+  position: absolute;
+  top: 50%;
+  -ms-transform: translateY(-50%);
+  -webkit-transform: translateY(-50%);
+  transform: translateY(-50%);
+}
+
+%h-c {
+  position: absolute;
+  left: 50%;
+  -ms-transform: translateX(-50%);
+  -webkit-transform: translateX(-50%);
+  transform: translateX(-50%);
+}
+%c-c {
+  position: absolute;
+  left: 50%;
+  top: 50%;
+  -ms-transform: translate(-50%, -50%);
+  -webkit-transform: translate(-50%, -50%);
+  transform: translate(-50%, -50%);
+}
+
+// Background Image
+%bgcontain {
+  background-repeat: no-repeat;
+  background-position: center;
+  background-size: contain;
+}
+
+%bgcover {
+  background-repeat: no-repeat;
+  background-position: center;
+  background-size: cover;
+}
+
+// Flex Center center
+%fcc {
+  display: flex;
+  justify-content: center;
+  align-items: center;
+}
+
+%fjb {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+}
+
+%fja {
+  display: flex;
+  justify-content: space-around;
+  align-items: center;
+}
+
+%fjs {
+  display: flex;
+  justify-content: flex-start;
+  align-items: center;
+}
+
+%fjs {
+  display: flex;
+  justify-content: flex-end;
+  align-items: center;
+}
+
+// Img Fluid
+%whfluid {
+  max-width: 100%;
+  height: auto;
+}
+
+// img full
+%wh100 {
+  width: 100%;
+  height: 100%;
+}
+
+// Position Full
+%pa_full {
+  position: absolute;
+  top: 0;
+  left: 0;
+  right: 0;
+  bottom: 0;
+}
+
+// Transition
+%tr03 {
+  transition: all 0.3s ease-out;
+}
+
+%tr02 {
+  transition: all 0.2s ease-out;
+}
+
+%text-shorten {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+%center-block {
+  display: block;
+  margin-left: auto;
+  margin-right: auto;
+}
+
+%aftercenter {
+  position: relative;
+
+  &::after {
+    content: "";
+    z-index: -2;
+    position: absolute;
+    top: 50%;
+    left: 50%;
+    transform: translate(-50%, -50%);
+  }
+}