Warn about invalid strings in arithmetic

Squashed commit of the following:

commit e05d3b67325d4521418483ed924ac9211a188919
Author: Andrea Faulds <ajf@ajf.me>
Date:   Wed Mar 30 01:43:35 2016 +0100

    UPGRADING and NEWS

commit 6caf1d4585207d1b02fb06a216cd7da1a1f5e12d
Author: Andrea Faulds <ajf@ajf.me>
Date:   Sun Mar 20 21:18:33 2016 +0000

    Fixes

commit 6dadb1b0efe5e2ed071e95a55c806519e61377ac
Author: Andrea Faulds <ajf@ajf.me>
Date:   Sun Feb 14 02:15:01 2016 +0000

    Add test for numeric string errors in assignment

commit bd5f04e8dd576f92a48d25546f4f9a0f57f374de
Author: Andrea Faulds <ajf@ajf.me>
Date:   Sat Feb 13 23:53:05 2016 +0000

    Add test for numeric string errors

commit c72e92f16d512bcae30cc9639c89bcb08d971742
Author: Andrea Faulds <ajf@ajf.me>
Date:   Tue Jan 26 23:28:33 2016 +0000

    Add test for scientific notation in integer operations

commit d94c08852d405b3a7ef6c84d24bf7915c890ce78
Author: Andrea Faulds <ajf@ajf.me>
Date:   Sun Feb 14 01:25:57 2016 +0000

    Disable optimiser evaluation for numeric string errors

commit 30ee954ed13d933e766c68605d683c8ebae3d8ee
Author: Andrea Faulds <ajf@ajf.me>
Date:   Sun Feb 14 01:46:25 2016 +0000

    fixup

commit a6403b79e054c95e2b7345d787f3092b261eed27
Author: Andrea Faulds <ajf@ajf.me>
Date:   Sat Feb 13 22:00:27 2016 +0000

    Do not convert error-causing numeric strings ahead-of-time

commit f9dc35401471ef3035954cb6f171826769297548
Author: Andrea Faulds <ajf@ajf.me>
Date:   Sat Feb 13 19:15:38 2016 +0000

    Disable compile-time evaluation for numeric string errors

commit e05b0cc8496ea082c6db27efd8b8277ef1f785b5
Author: Andrea Faulds <ajf@ajf.me>
Date:   Fri Feb 5 11:42:26 2016 +0000

    Make _zval_get_long_func_noisy function for inlining

commit 84d66321a57e579759109650c8bb7e3d5002854a
Author: Andrea Faulds <ajf@ajf.me>
Date:   Tue Jan 26 23:10:00 2016 +0000

    Update tests

commit 5ac4a0cc4bff282e3a15eaa8ab44b67391881a6d
Author: Andrea Faulds <ajf@ajf.me>
Date:   Tue Jan 26 22:08:19 2016 +0000

    Use is_numeric_string_ex for zval_get_long etc.

commit c21f08848533723331012a62a153de3577731d6a
Author: Andrea Faulds <ajf@ajf.me>
Date:   Thu Jan 7 21:13:04 2016 +0000

    Update tests

commit 63e214cf8160420bfc51c6a2b4ae32f09ad8e8af
Author: Andrea Faulds <ajf@ajf.me>
Date:   Wed Jan 6 00:28:01 2016 +0000

    Warn on non-/bad numeric strings in arithmetic

5 files changed, 64 insertions, 36 deletions

diff --git a/tests/lang/bug28800.phpt b/tests/lang/bug28800.phpt
index f81ad7fec9..8bd2c306e1 100644
--- a/tests/lang/bug28800.phpt
+++ b/tests/lang/bug28800.phpt
@@ -7,11 +7,23 @@ Bug #28800 (Incorrect string to number conversion for strings starting with 'inf
 		echo ($v+0)."\n";
 	}
 ?>
---EXPECT--
+--EXPECTF--
+
+Warning: A non-numeric value encountered in %s on line %d
 0
+
+Warning: A non-numeric value encountered in %s on line %d
 0
+
+Warning: A non-numeric value encountered in %s on line %d
 0
+
+Warning: A non-numeric value encountered in %s on line %d
 0
+
+Warning: A non-numeric value encountered in %s on line %d
 0
+
+Warning: A non-numeric value encountered in %s on line %d
 0
 
diff --git a/tests/lang/operators/bitwiseShiftLeft_variationStr_64bit.phpt b/tests/lang/operators/bitwiseShiftLeft_variationStr_64bit.phpt
index d5888d837f..69fd90f1c8 100644
--- a/tests/lang/operators/bitwiseShiftLeft_variationStr_64bit.phpt
+++ b/tests/lang/operators/bitwiseShiftLeft_variationStr_64bit.phpt
@@ -226,17 +226,17 @@ int(984)
 --- testing: '123abc' << 'a5.9' ---

 int(123)

 --- testing: '123e5' << '0' ---

-int(123)

+int(12300000)

 --- testing: '123e5' << '65' ---

 int(0)

 --- testing: '123e5' << '-44' ---

 Exception: Bit shift by negative number

 --- testing: '123e5' << '1.2' ---

-int(246)

+int(24600000)

 --- testing: '123e5' << '-7.7' ---

 Exception: Bit shift by negative number

 --- testing: '123e5' << 'abc' ---

-int(123)

+int(12300000)

 --- testing: '123e5' << '123abc' ---

 int(0)

 --- testing: '123e5' << '123e5' ---

@@ -250,21 +250,21 @@ int(0)
 --- testing: '123e5' << '123abc ' ---

 int(0)

 --- testing: '123e5' << '3.4a' ---

-int(984)

+int(98400000)

 --- testing: '123e5' << 'a5.9' ---

-int(123)

+int(12300000)

 --- testing: '123e5xyz' << '0' ---

-int(123)

+int(12300000)

 --- testing: '123e5xyz' << '65' ---

 int(0)

 --- testing: '123e5xyz' << '-44' ---

 Exception: Bit shift by negative number

 --- testing: '123e5xyz' << '1.2' ---

-int(246)

+int(24600000)

 --- testing: '123e5xyz' << '-7.7' ---

 Exception: Bit shift by negative number

 --- testing: '123e5xyz' << 'abc' ---

-int(123)

+int(12300000)

 --- testing: '123e5xyz' << '123abc' ---

 int(0)

 --- testing: '123e5xyz' << '123e5' ---

@@ -278,9 +278,9 @@ int(0)
 --- testing: '123e5xyz' << '123abc ' ---

 int(0)

 --- testing: '123e5xyz' << '3.4a' ---

-int(984)

+int(98400000)

 --- testing: '123e5xyz' << 'a5.9' ---

-int(123)

+int(12300000)

 --- testing: ' 123abc' << '0' ---

 int(123)

 --- testing: ' 123abc' << '65' ---

diff --git a/tests/lang/operators/bitwiseShiftRight_variationStr.phpt b/tests/lang/operators/bitwiseShiftRight_variationStr.phpt
index a86d0cfddb..a4c425aab3 100644
--- a/tests/lang/operators/bitwiseShiftRight_variationStr.phpt
+++ b/tests/lang/operators/bitwiseShiftRight_variationStr.phpt
@@ -222,17 +222,17 @@ int(15)
 --- testing: '123abc' >> 'a5.9' ---
 int(123)
 --- testing: '123e5' >> '0' ---
-int(123)
+int(12300000)
 --- testing: '123e5' >> '65' ---
 int(0)
 --- testing: '123e5' >> '-44' ---
 Exception: Bit shift by negative number
 --- testing: '123e5' >> '1.2' ---
-int(61)
+int(6150000)
 --- testing: '123e5' >> '-7.7' ---
 Exception: Bit shift by negative number
 --- testing: '123e5' >> 'abc' ---
-int(123)
+int(12300000)
 --- testing: '123e5' >> '123abc' ---
 int(0)
 --- testing: '123e5' >> '123e5' ---
@@ -246,21 +246,21 @@ int(0)
 --- testing: '123e5' >> '123abc ' ---
 int(0)
 --- testing: '123e5' >> '3.4a' ---
-int(15)
+int(1537500)
 --- testing: '123e5' >> 'a5.9' ---
-int(123)
+int(12300000)
 --- testing: '123e5xyz' >> '0' ---
-int(123)
+int(12300000)
 --- testing: '123e5xyz' >> '65' ---
 int(0)
 --- testing: '123e5xyz' >> '-44' ---
 Exception: Bit shift by negative number
 --- testing: '123e5xyz' >> '1.2' ---
-int(61)
+int(6150000)
 --- testing: '123e5xyz' >> '-7.7' ---
 Exception: Bit shift by negative number
 --- testing: '123e5xyz' >> 'abc' ---
-int(123)
+int(12300000)
 --- testing: '123e5xyz' >> '123abc' ---
 int(0)
 --- testing: '123e5xyz' >> '123e5' ---
@@ -274,9 +274,9 @@ int(0)
 --- testing: '123e5xyz' >> '123abc ' ---
 int(0)
 --- testing: '123e5xyz' >> '3.4a' ---
-int(15)
+int(1537500)
 --- testing: '123e5xyz' >> 'a5.9' ---
-int(123)
+int(12300000)
 --- testing: ' 123abc' >> '0' ---
 int(123)
 --- testing: ' 123abc' >> '65' ---
diff --git a/tests/lang/operators/modulus_variationStr.phpt b/tests/lang/operators/modulus_variationStr.phpt
index c647ecd380..4cfd7768ff 100644
--- a/tests/lang/operators/modulus_variationStr.phpt
+++ b/tests/lang/operators/modulus_variationStr.phpt
@@ -208,9 +208,9 @@ Exception: Modulo by zero
 --- testing: '123abc' % '123abc' ---

 int(0)

 --- testing: '123abc' % '123e5' ---

-int(0)

+int(123)

 --- testing: '123abc' % '123e5xyz' ---

-int(0)

+int(123)

 --- testing: '123abc' % ' 123abc' ---

 int(0)

 --- testing: '123abc' % '123 abc' ---

@@ -224,13 +224,13 @@ Exception: Modulo by zero
 --- testing: '123e5' % '0' ---

 Exception: Modulo by zero

 --- testing: '123e5' % '65' ---

-int(58)

+int(50)

 --- testing: '123e5' % '-44' ---

-int(35)

+int(20)

 --- testing: '123e5' % '1.2' ---

 int(0)

 --- testing: '123e5' % '-7.7' ---

-int(4)

+int(6)

 --- testing: '123e5' % 'abc' ---

 Exception: Modulo by zero

 --- testing: '123e5' % '123abc' ---

@@ -252,13 +252,13 @@ Exception: Modulo by zero
 --- testing: '123e5xyz' % '0' ---

 Exception: Modulo by zero

 --- testing: '123e5xyz' % '65' ---

-int(58)

+int(50)

 --- testing: '123e5xyz' % '-44' ---

-int(35)

+int(20)

 --- testing: '123e5xyz' % '1.2' ---

 int(0)

 --- testing: '123e5xyz' % '-7.7' ---

-int(4)

+int(6)

 --- testing: '123e5xyz' % 'abc' ---

 Exception: Modulo by zero

 --- testing: '123e5xyz' % '123abc' ---

@@ -292,9 +292,9 @@ Exception: Modulo by zero
 --- testing: ' 123abc' % '123abc' ---

 int(0)

 --- testing: ' 123abc' % '123e5' ---

-int(0)

+int(123)

 --- testing: ' 123abc' % '123e5xyz' ---

-int(0)

+int(123)

 --- testing: ' 123abc' % ' 123abc' ---

 int(0)

 --- testing: ' 123abc' % '123 abc' ---

@@ -320,9 +320,9 @@ Exception: Modulo by zero
 --- testing: '123 abc' % '123abc' ---

 int(0)

 --- testing: '123 abc' % '123e5' ---

-int(0)

+int(123)

 --- testing: '123 abc' % '123e5xyz' ---

-int(0)

+int(123)

 --- testing: '123 abc' % ' 123abc' ---

 int(0)

 --- testing: '123 abc' % '123 abc' ---

@@ -348,9 +348,9 @@ Exception: Modulo by zero
 --- testing: '123abc ' % '123abc' ---

 int(0)

 --- testing: '123abc ' % '123e5' ---

-int(0)

+int(123)

 --- testing: '123abc ' % '123e5xyz' ---

-int(0)

+int(123)

 --- testing: '123abc ' % ' 123abc' ---

 int(0)

 --- testing: '123abc ' % '123 abc' ---

diff --git a/tests/lang/operators/negate_variationStr.phpt b/tests/lang/operators/negate_variationStr.phpt
index a25bdda7f5..7405d42882 100644
--- a/tests/lang/operators/negate_variationStr.phpt
+++ b/tests/lang/operators/negate_variationStr.phpt
@@ -16,7 +16,7 @@ foreach ($strVals as $strVal) {
    

 ?>

 ===DONE===

---EXPECT--

+--EXPECTF--

 --- testing: '0' ---
 int(0)
 --- testing: '65' ---
@@ -28,21 +28,37 @@ float(-1.2)
 --- testing: '-7.7' ---
 float(7.7)
 --- testing: 'abc' ---
+
+Warning: A non-numeric value encountered in %s on line %d
 int(0)
 --- testing: '123abc' ---
+
+Notice: A non well formed numeric value encountered in %s on line %d
 int(-123)
 --- testing: '123e5' ---
 float(-12300000)
 --- testing: '123e5xyz' ---
+
+Notice: A non well formed numeric value encountered in %s on line %d
 float(-12300000)
 --- testing: ' 123abc' ---
+
+Notice: A non well formed numeric value encountered in %s on line %d
 int(-123)
 --- testing: '123 abc' ---
+
+Notice: A non well formed numeric value encountered in %s on line %d
 int(-123)
 --- testing: '123abc ' ---
+
+Notice: A non well formed numeric value encountered in %s on line %d
 int(-123)
 --- testing: '3.4a' ---
+
+Notice: A non well formed numeric value encountered in %s on line %d
 float(-3.4)
 --- testing: 'a5.9' ---
+
+Warning: A non-numeric value encountered in %s on line %d
 int(0)

 ===DONE===