diff --git a/configure.ac b/configure.ac
index e7530f70a32..346f265808a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -564,7 +564,7 @@ PHP_CHECK_CPU_SUPPORTS([avx2])
 
 dnl Check for members of the stat structure
 AC_CHECK_MEMBERS([struct stat.st_blksize, struct stat.st_rdev])
-dnl AC_STRUCT_ST_BLOCKS will screw QNX because fileblocks.o does not exists
+dnl AC_STRUCT_ST_BLOCKS will screw QNX because fileblocks.o does not exist
 dnl The WARNING_LEVEL required because cc in QNX hates -w option without an argument
 if test "`uname -s 2>/dev/null`" != "QNX"; then
   AC_STRUCT_ST_BLOCKS
diff --git a/ext/ext_skel.php b/ext/ext_skel.php
index 96f6825a4ee..0e22659a6a0 100755
--- a/ext/ext_skel.php
+++ b/ext/ext_skel.php
@@ -324,7 +324,7 @@ if ($argc < 1) {
 $options = process_args($argv, $argc);
 
 if (!$options['dir'] || !is_dir($options['dir'])) {
-	error('The selected output directory does not exists');
+	error('The selected output directory does not exist');
 } else if (is_dir($options['dir'] . $options['ext'])) {
 	error('There is already a folder named "' . $options['ext'] . '" in the output directory');
 } else if (!mkdir($options['dir'] . $options['ext'])) {
diff --git a/ext/gd/tests/func.inc b/ext/gd/tests/func.inc
index 014d2e16447..34d9c471550 100644
--- a/ext/gd/tests/func.inc
+++ b/ext/gd/tests/func.inc
@@ -66,7 +66,7 @@ function get_libxpm_version()
  * The textual result is printed, so the EXPECT section should contain the line
  * "The images are equal."
  *
- * If the PNG file does not exists, or the images are not equal, a diagnostic
+ * If the PNG file does not exist, or the images are not equal, a diagnostic
  * message is printed, and the actual file is stored right beside the temporary
  * .php test file with the extension .out.png, to be able to manually inspect
  * the result.