ID: 14879
User updated by: [EMAIL PROTECTED]
Reported By: [EMAIL PROTECTED]
Status: Open
Bug Type: Scripting Engine problem
Operating System: Linux-Mandrake 8.1
PHP Version: 4.0.6
New Comment:
<?
## Assign a bit of HTML to two source variables
#
$space_source_text =
$null_source_text = "<b>PHP</b> <i>is</i> a useful <u>tool</u>";
## Replace a substring within the the source variables
# with another substring
$null_source_text = ereg_replace("", "|" $null_source_text);
$space_source_text = ereg_replace(" ", "|", $space_source_text);
## Print the new values of the source variables
#
print("This is the result of calling ereg_replace with an empty
parameter.<hr>$null_source_text<br><br><br>");
print("This is the result of calling ereg_replace with a space as the
value of the parameter.<hr>$space_source_text");
## Conclusion
#
# To me it seems that there are two significant points to make about the
behaviour of ereg_replace as demonstrated
# in this example.
#
# The first point is that, when passing an empty value in the first
parameter, the ereg_replace function inserts
# the second parameter between every character in the string, therefor
increasing the overall size of the string.
# It is inserting -- not replacing as the function name implies
#
# The second point is that, when passing an empty value in the first
parameter, the ereg_replace function does
# not evaluate the HTML tags so that they are correctly rendered to the
browser.
#
# Please keep in mind that I have yet to see the definition of
ereg_replace.
#
# At first, I thought the ereg_replace function was possibly checking to
see if the first parameter was empty, and if
# so, return execution immediatly to the caller. However, this doesn't
appear to be the case because it is obviously
# transversing the character array because it is inserting the second
parameter between each character.
#
# I'm guessing that PHP does some internal escaping of HTML characters
and the empty first parameter is somehow
# goofing up the translation back to clean HTML
#
##
?>
Previous Comments:
------------------------------------------------------------------------
[2002-01-05 18:33:02] [EMAIL PROTECTED]
<?
## Assign a bit of HTML to two source variables
#
$space_source_text =
$null_source_text = "<b>PHP</b> <i>is</i> a useful <u>tool</u>";
## Replace a substring within the the source variables
# with another substring
$null_source_text = ereg_replace("", "|",
$null_source_text);
$space_source_text = ereg_replace(" ", "|",
$space_source_text);
## Print the new values of the source variables
#
print("This is the result of calling ereg_replace with an empty
parameter.<hr>$null_source_text<br><br><br>");
print("This is the result of calling ereg_replace with a space as the
value of the parameter.<hr>$space_source_text");
## Conclusion
#
# To me it seems that there are two significant points to make about
the behaviour of ereg_replace as demonstrated
# in this example.
#
# The first point is that, when passing an empty value in the first
parameter, the ereg_replace function inserts
# the second parameter between every character in the string, therefor
increasing the overall size of the string.
# It is inserting -- not replacing as the function name implies
#
# The second point is that, when passing an empty value in the first
parameter, the ereg_replace function does
# not evaluate the HTML tags so that they are correctly rendered to the
browser.
#
# Please keep in mind that I have yet to see the definition of
ereg_replace.
#
# At first, I thought the ereg_replace function was possibly checking
to see if the first parameter was empty, and if
# so, return execution immediatly to the caller. However, this doesn't
appear to be the case because it is obviously
# transversing the character array because it is inserting the second
parameter between each character.
#
# I'm guessing that PHP does some internal escaping of HTML characters
and the empty first parameter is somehow
# goofing up the translation back to clean HTML
#
##
?>
------------------------------------------------------------------------
Edit this bug report at http://bugs.php.net/?id=14879&edit=1
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