optimize method calls (#24783)

replace `strpos(strtolower(` with `stripos(`.

Author: browner12

src/Illuminate/Database/Grammar.php

@@ -58,7 +58,7 @@ public function wrap($value, $prefixAlias = false)
         // If the value being wrapped has a column alias we will need to separate out
         // the pieces so we can wrap each of the segments of the expression on its
         // own, and then join these both back together using the "as" connector.
-        if (strpos(strtolower($value), ' as ') !== false) {
+        if (stripos($value, ' as ') !== false) {
             return $this->wrapAliasedValue($value, $prefixAlias);
         }
 

src/Illuminate/Database/Query/Builder.php

@@ -2057,7 +2057,7 @@ protected function runPaginationCountQuery($columns = ['*'])
     protected function withoutSelectAliases(array $columns)
     {
         return array_map(function ($column) {
-            return is_string($column) && ($aliasPosition = strpos(strtolower($column), ' as ')) !== false
+            return is_string($column) && ($aliasPosition = stripos($column, ' as ')) !== false
                     ? substr($column, 0, $aliasPosition) : $column;
         }, $columns);
     }

src/Illuminate/Database/Query/Grammars/Grammar.php

@@ -905,7 +905,7 @@ public function wrap($value, $prefixAlias = false)
         // If the value being wrapped has a column alias we will need to separate out
         // the pieces so we can wrap each of the segments of the expression on its
         // own, and then join these both back together using the "as" connector.
-        if (strpos(strtolower($value), ' as ') !== false) {
+        if (stripos($value, ' as ') !== false) {
             return $this->wrapAliasedValue($value, $prefixAlias);
         }
 

src/Illuminate/Database/Query/Grammars/MySqlGrammar.php

@@ -276,7 +276,7 @@ protected function compileDeleteWithJoins($query, $table, $where)
     {
         $joins = ' '.$this->compileJoins($query, $query->joins);
 
-        $alias = strpos(strtolower($table), ' as ') !== false
+        $alias = stripos($table, ' as ') !== false
                 ? explode(' as ', $table)[1] : $table;
 
         return trim("delete {$alias} from {$table}{$joins} {$where}");

src/Illuminate/Database/Query/Grammars/SqlServerGrammar.php

@@ -298,7 +298,7 @@ protected function compileDeleteWithJoins(Builder $query, $table, $where)
     {
         $joins = ' '.$this->compileJoins($query, $query->joins);
 
-        $alias = strpos(strtolower($table), ' as ') !== false
+        $alias = stripos($table, ' as ') !== false
                 ? explode(' as ', $table)[1] : $table;
 
         return trim("delete {$alias} from {$table}{$joins} {$where}");
@@ -364,7 +364,7 @@ protected function parseUpdateTable($table)
     {
         $table = $alias = $this->wrapTable($table);
 
-        if (strpos(strtolower($table), '] as [') !== false) {
+        if (stripos($table, '] as [') !== false) {
             $alias = '['.explode('] as [', $table)[1];
         }