Regular
Expressions
101
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Explanation
/
<iframe
[^
>
]
*?
title=
(
\\\'
|
\\
"
|
[
\'
"
]
)(
[^
>
]
*?
)
\1
/
gm
<iframe
matches the characters
<iframe
literally (case sensitive)
Match a single character not present in the list below
[^
>
]
*?
matches the previous token between
zero
and
unlimited
times, as few times as possible, expanding as needed
(lazy)
>
matches the character
>
with index
62
10
(
3E
16
or
76
8
) literally (case sensitive)
title=
matches the characters
title=
literally (case sensitive)
1st Capturing Group
(
\\\'
|
\\
"
|
[
\'
"
]
)
1st Alternative
\\\'
\\
matches the character
\
with index
92
10
(
5C
16
or
134
8
) literally (case sensitive)
\'
matches the character
'
with index
39
10
(
27
16
or
47
8
) literally (case sensitive)
2nd Alternative
\\
"
\\
matches the character
\
with index
92
10
(
5C
16
or
134
8
) literally (case sensitive)
"
matches the character
"
with index
34
10
(
22
16
or
42
8
) literally (case sensitive)
3rd Alternative
[
\'
"
]
Match a single character present in the list below
[
\'
"
]
\'
matches the character
'
with index
39
10
(
27
16
or
47
8
) literally (case sensitive)
"
matches the character
"
with index
34
10
(
22
16
or
42
8
) literally (case sensitive)
2nd Capturing Group
(
[^
>
]
*?
)
Match a single character not present in the list below
[^
>
]
*?
matches the previous token between
zero
and
unlimited
times, as few times as possible, expanding as needed
(lazy)
>
matches the character
>
with index
62
10
(
3E
16
or
76
8
) literally (case sensitive)
\1
matches the same text as most recently matched by the
1st
capturing group
Global pattern flags
g modifier:
g
lobal. All matches (don't return after first match)
m modifier:
m
ulti line. Causes
^
and
$
to match the begin/end of each line (not only begin/end of string)
Match Information
Your regular expression does not match the subject string.
Try launching the debugger to find out why.
Quick Reference
Regular Expression
v2
No Match
/
/
gm
Test String
Code Generator
Language
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Generated Code
Loading code sample...
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report.
For a full regex reference for PHP, please visit:
http://php.net/manual/en/ref.pcre.php
Regular
Expressions
101
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