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Date: 08/31/00
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perugini Thu Aug 31 15:23:23 2000 EDT
Modified files:
/phpdoc/it/language operators.xml
Log:
Sync with en tree.
Index: phpdoc/it/language/operators.xml
diff -u phpdoc/it/language/operators.xml:1.1 phpdoc/it/language/operators.xml:1.2
--- phpdoc/it/language/operators.xml:1.1 Sat Dec 18 17:01:09 1999
+++ phpdoc/it/language/operators.xml Thu Aug 31 15:23:23 2000
@@ -1,311 +1,360 @@
- <chapter id="language.operators">
- <title>Operators</title>
+ <chapter id="language.operators">
+ <title>Operators</title>
+ <simpara>
+ </simpara>
+
+ <sect1 id="language.operators.arithmetic">
+ <title>Arithmetic Operators</title>
<simpara>
+ Remember basic arithmetic from school? These work just
+ like those.
</simpara>
-
- <sect1 id="language.operators.arithmetic">
+ <table>
<title>Arithmetic Operators</title>
- <simpara>
- Remember basic arithmetic from school? These work just
- like those.
- </simpara>
-
- <table>
- <title>Arithmetic Operators</title>
- <tgroup cols="3">
- <thead>
- <row>
- <entry>example</entry>
- <entry>name</entry>
- <entry>result</entry>
- </row>
- </thead>
- <tbody>
- <row>
- <entry>$a + $b</entry>
- <entry>Addition</entry>
- <entry>Sum of $a and $b.</entry>
- </row>
- <row>
- <entry>$a - $b</entry>
- <entry>Subtraction</entry>
- <entry>Difference of $a and $b.</entry>
- </row>
- <row>
- <entry>$a * $b</entry>
- <entry>Multiplication</entry>
- <entry>Product of $a and $b.</entry>
- </row>
- <row>
- <entry>$a / $b</entry>
- <entry>Division</entry>
- <entry>Quotient of $a and $b.</entry>
- </row>
- <row>
- <entry>$a % $b</entry>
- <entry>Modulus</entry>
- <entry>Remainder of $a divided by $b.</entry>
- </row>
- </tbody>
- </tgroup>
- </table>
-
-<!-- This appears to be inaccurate. Division always returns a float.
- <simpara>
- The division operator ("/") returns an integer value (the result
- of an integer division) if the two operands are integers (or
- strings that get converted to integers). If either operand is a
- floating-point value, floating-point division is performed.
- </simpara>
---></sect1>
-
- <sect1 id="language.operators.assignment">
- <title>Assignment Operators</title>
- <simpara>
- The basic assignment operator is "=". Your first inclination might
- be to think of this as "equal to". Don't. It really means that
- the the left operand gets set to the value of the expression on the
- rights (that is, "gets set to").
- </simpara>
- <para>
- The value of an assignment expression is the value assigned. That
- is, the value of "$a = 3" is 3. This allows you to do some tricky
- things: <informalexample><programlisting>
+ <tgroup cols="3">
+ <thead>
+ <row>
+ <entry>Example</entry>
+ <entry>Name</entry>
+ <entry>Result</entry>
+ </row>
+ </thead>
+ <tbody>
+ <row>
+ <entry>$a + $b</entry>
+ <entry>Addition</entry>
+ <entry>Sum of $a and $b.</entry>
+ </row>
+ <row>
+ <entry>$a - $b</entry>
+ <entry>Subtraction</entry>
+ <entry>Difference of $a and $b.</entry>
+ </row>
+ <row>
+ <entry>$a * $b</entry>
+ <entry>Multiplication</entry>
+ <entry>Product of $a and $b.</entry>
+ </row>
+ <row>
+ <entry>$a / $b</entry>
+ <entry>Division</entry>
+ <entry>Quotient of $a and $b.</entry>
+ </row>
+ <row>
+ <entry>$a % $b</entry>
+ <entry>Modulus</entry>
+ <entry>Remainder of $a divided by $b.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <simpara>
+ The division operator ("/") returns an integer value (the result
+ of an integer division) if the two operands are integers (or
+ strings that get converted to integers) and the quotient is an
+ integer. If either operand is a floating-point value, or the
+ operation results in a non-integer value, a floating-point value
+ is returned.
+ </simpara>
+ </sect1>
+
+ <sect1 id="language.operators.assignment">
+ <title>Assignment Operators</title>
+ <simpara>
+ The basic assignment operator is "=". Your first inclination might
+ be to think of this as "equal to". Don't. It really means that the
+ the left operand gets set to the value of the expression on the
+ rights (that is, "gets set to").
+ </simpara>
+ <para>
+ The value of an assignment expression is the value assigned. That
+ is, the value of "$a = 3" is 3. This allows you to do some tricky
+ things:
+ <informalexample>
+ <programlisting role="php">
$a = ($b = 4) + 5; // $a is equal to 9 now, and $b has been set to 4.
-</programlisting></informalexample>
- </para>
- <para>
- In addition to the basic assignment operator, there are "combined
- operators" for all of the binary arithmetic and string operators
- that allow you to use a value in an expression and then set its
- value to the result of that expression. For example: <informalexample><programlisting>
+ </programlisting>
+ </informalexample>
+ </para>
+ <para>
+ In addition to the basic assignment operator, there are "combined
+ operators" for all of the binary arithmetic and string operators
+ that allow you to use a value in an expression and then set its
+ value to the result of that expression. For example:
+ <informalexample>
+ <programlisting role="php">
$a = 3;
$a += 5; // sets $a to 8, as if we had said: $a = $a + 5;
$b = "Hello ";
$b .= "There!"; // sets $b to "Hello There!", just like $b = $b . "There!";
-</programlisting></informalexample>
- </para>
-
+ </programlisting>
+ </informalexample>
+ </para>
<para>
- Note that the assignment copies the original variable to the new
- one (assignment by value), so changes to one will not affect the
- other. This may also have relevance if you need to copy something
- like a large array inside a tight loop. PHP4 supports assignment
- by reference, using the <computeroutput>$var =
- &$othervar;</computeroutput> syntax, but this is not possible
- in PHP3. 'Assignment by reference' means that both variables end
- up pointing at the same data, and nothing is copied anywhere.
+ Note that the assignment copies the original variable to the new
+ one (assignment by value), so changes to one will not affect the
+ other. This may also have relevance if you need to copy something
+ like a large array inside a tight loop. PHP4 supports assignment
+ by reference, using the <computeroutput>$var =
+ &$othervar;</computeroutput> syntax, but this is not possible
+ in PHP3. 'Assignment by reference' means that both variables end
+ up pointing at the same data, and nothing is copied anywhere.
+ To learn more about references, please read <link
+ linkend="language.references">References explained</link>.
</para>
-
</sect1>
- <sect1 id="language.operators.bitwise">
+ <sect1 id="language.operators.bitwise">
+ <title>Bitwise Operators</title>
+ <simpara>
+ Bitwise operators allow you to turn specific bits within an
+ integer on or off.
+ </simpara>
+ <table>
<title>Bitwise Operators</title>
- <simpara>
- Bitwise operators allow you to turn specific bits within an integer
- on or off.
- </simpara>
-
- <table>
- <title>Bitwise Operators</title>
- <tgroup cols="3">
- <thead>
- <row>
- <entry>example</entry>
- <entry>name</entry>
- <entry>result</entry>
- </row>
- </thead>
- <tbody>
- <row>
- <entry>$a & $b</entry>
- <entry>And</entry>
- <entry>Bits that are set in both $a and $b are set.</entry>
- </row>
- <row>
- <entry>$a | $b</entry>
- <entry>Or</entry>
- <entry>Bits that are set in either $a or $b are set.</entry>
- </row>
- <row>
- <entry>$a ^ $b</entry>
- <entry>Xor</entry>
- <entry>Bits that are set in $a or $b but not both are set.</entry>
- </row>
- <row>
- <entry>~ $a</entry>
- <entry>Not</entry>
- <entry>Bits that are set in $a are not set, and vice versa.</entry>
- </row>
- <row>
- <entry>$a << $b</entry>
- <entry>Shift left</entry>
- <entry>Shift the bits of $a $b steps to the left (each step means "multiply by two")</entry>
- </row>
- <row>
- <entry>$a >> $b</entry>
- <entry>Shift right</entry>
- <entry>Shift the bits of $a $b steps to the right (each step means "divide by two")</entry>
- </row>
- </tbody>
- </tgroup>
- </table>
+ <tgroup cols="3">
+ <thead>
+ <row>
+ <entry>Example</entry>
+ <entry>Name</entry>
+ <entry>Result</entry>
+ </row>
+ </thead>
+ <tbody>
+ <row>
+ <entry>$a & $b</entry>
+ <entry>And</entry>
+ <entry>Bits that are set in both $a and $b are set.</entry>
+ </row>
+ <row>
+ <entry>$a | $b</entry>
+ <entry>Or</entry>
+ <entry>Bits that are set in either $a or $b are set.</entry>
+ </row>
+ <row>
+ <entry>$a ^ $b</entry>
+ <entry>Xor</entry>
+ <entry>
+ Bits that are set in $a or $b but not both are set.
+ </entry>
+ </row>
+ <row>
+ <entry>~ $a</entry>
+ <entry>Not</entry>
+ <entry>
+ Bits that are set in $a are not set, and vice versa.
+ </entry>
+ </row>
+ <row>
+ <entry>$a << $b</entry>
+ <entry>Shift left</entry>
+ <entry>
+ Shift the bits of $a $b steps to the left (each step means
+ "multiply by two")
+ </entry>
+ </row>
+ <row>
+ <entry>$a >> $b</entry>
+ <entry>Shift right</entry>
+ <entry>
+ Shift the bits of $a $b steps to the right (each step means
+ "divide by two")
+ </entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
</sect1>
-
-
- <sect1 id="language.operators.comparison">
+ <sect1 id="language.operators.comparison">
+ <title>Comparison Operators</title>
+ <simpara>
+ Comparison operators, as their name implies, allow you to compare
+ two values.
+ </simpara>
+ <table>
<title>Comparison Operators</title>
- <simpara>
- Comparison operators, as their name implies, allow you to compare
- two values.
- </simpara>
-
- <table>
- <title>Comparison Operators</title>
- <tgroup cols="3">
- <thead>
- <row>
- <entry>example</entry>
- <entry>name</entry>
- <entry>result</entry>
- </row>
- </thead>
- <tbody>
- <row>
- <entry>$a == $b</entry>
- <entry>Equal</entry>
- <entry>True if $a is equal to $b.</entry>
- </row>
- <row>
- <entry>$a === $b</entry>
- <entry>Identical</entry>
- <entry>True if $a is equal to $b, and they are of the same
- type. (PHP4 only)</entry>
- </row>
- <row>
- <entry>$a != $b</entry>
- <entry>Not equal</entry>
- <entry>True if $a is not equal to $b.</entry>
- </row>
- <row>
- <entry>$a < $b</entry>
- <entry>Less than</entry>
- <entry>True if $a is strictly less than $b.</entry>
- </row>
- <row>
- <entry>$a > $b</entry>
- <entry>Greater than</entry>
- <entry>True if $a is strictly greater than $b.</entry>
- </row>
- <row>
- <entry>$a <= $b</entry>
- <entry>Less than or equal to </entry>
- <entry>True if $a is less than or equal to $b.</entry>
- </row>
- <row>
- <entry>$a >= $b</entry>
- <entry>Greater than or equal to </entry>
- <entry>True if $a is greater than or equal to $b.</entry>
- </row>
- </tbody>
- </tgroup>
- </table>
-
+ <tgroup cols="3">
+ <thead>
+ <row>
+ <entry>Example</entry>
+ <entry>Name</entry>
+ <entry>Result</entry>
+ </row>
+ </thead>
+ <tbody>
+ <row>
+ <entry>$a == $b</entry>
+ <entry>Equal</entry>
+ <entry>True if $a is equal to $b.</entry>
+ </row>
+ <row>
+ <entry>$a === $b</entry>
+ <entry>Identical</entry>
+ <entry>
+ True if $a is equal to $b, and they are of the same
+ type. (PHP4 only)
+ </entry>
+ </row>
+ <row>
+ <entry>$a != $b</entry>
+ <entry>Not equal</entry>
+ <entry>True if $a is not equal to $b.</entry>
+ </row>
+ <row>
+ <entry>$a !== $b</entry>
+ <entry>Not identical</entry>
+ <entry>
+ True if $a is not equal to $b, or they are not of the same
+ type. (PHP4 only)
+ </entry>
+ </row>
+ <row>
+ <entry>$a < $b</entry>
+ <entry>Less than</entry>
+ <entry>True if $a is strictly less than $b.</entry>
+ </row>
+ <row>
+ <entry>$a > $b</entry>
+ <entry>Greater than</entry>
+ <entry>True if $a is strictly greater than $b.</entry>
+ </row>
+ <row>
+ <entry>$a <= $b</entry>
+ <entry>Less than or equal to </entry>
+ <entry>True if $a is less than or equal to $b.</entry>
+ </row>
+ <row>
+ <entry>$a >= $b</entry>
+ <entry>Greater than or equal to </entry>
+ <entry>True if $a is greater than or equal to $b.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
<para>
- Another conditional operator is the "?:" (or trinary) operator,
- which operates as in C and many other languages.
-
- <informalexample>
- <programlisting>
+ Another conditional operator is the "?:" (or trinary) operator,
+ which operates as in C and many other languages.
+ <informalexample>
+ <programlisting>
(expr1) ? (expr2) : (expr3);
- </programlisting>
- </informalexample>
-
- This expression evaluates to <replaceable>expr2</replaceable> if
- <replaceable>expr1</replaceable> evaluates to true, and
- <replaceable>expr3</replaceable> if
- <replaceable>expr1</replaceable> evaluates to false.
+ </programlisting>
+ </informalexample>
+ This expression evaluates to <replaceable>expr2</replaceable> if
+ <replaceable>expr1</replaceable> evaluates to true, and
+ <replaceable>expr3</replaceable> if
+ <replaceable>expr1</replaceable> evaluates to false.
</para>
</sect1>
-
+ <sect1 id="language.operators.errorcontrol">
+ <title>Error Control Operators</title>
+ <simpara>
+ PHP supports one error control operator: the at sign (@). When
+ prepended to an expression in PHP, any error messages that might
+ be generated by that expression will be ignored.
+ </simpara>
+ <simpara>
+ If the <link linkend="ini.track-errors">track_errors</link>
+ feature is enabled, any error message generated by the expression
+ will be saved in the global variable $php_errormsg. This variable
+ will be overwritten on each error, so check early if you want to
+ use it.
+ </simpara>
+ <para>
+ <informalexample>
+ <programlisting role="php">
+<?php
+/* Intentional SQL error (extra quote): */
+$res = <email protected> ("select name, code from 'namelist") or
+ die ("Query failed: error was '$php_errormsg'");
+?>
+ </programlisting>
+ </informalexample>
+ </para>
+ <simpara>
+ See also <function>error_reporting</function>.
+ </simpara>
+ <warning>
+ <para>
+ Currently the "@" error-control operator prefix will even disable
+ error reporting for critical errors that will terminate script
+ execution. Among other things, this means that if you use "@" to
+ suppress errors from a certain function and either it isn't
+ available or has been mistyped, the script will die right there
+ with no indication as to why.
+ </para>
+ </warning>
+ </sect1>
+
<sect1 id="language.operators.execution">
<title>Execution Operators</title>
-
<para>
- PHP supports one execution operator: backticks (``). Note that
- these are not single-quotes! PHP will attempt to execute the
- contents of the backticks as a shell command; the output will be
- returned (i.e., it won't simply be dumped to output; it can be
- assigned to a variable).
-
- <informalexample>
- <programlisting role="php">
+ PHP supports one execution operator: backticks (``). Note that
+ these are not single-quotes! PHP will attempt to execute the
+ contents of the backticks as a shell command; the output will be
+ returned (i.e., it won't simply be dumped to output; it can be
+ assigned to a variable).
+ <informalexample>
+ <programlisting role="php">
$output = `ls -al`;
echo "<pre>$output</pre>";
- </programlisting>
- </informalexample>
-
+ </programlisting>
+ </informalexample>
</para>
-
<para>
- See also <function>system</function>,
- <function>passthru</function>, <function>exec</function>,
- <function>popen</function>, and
- <function>escapeshellcmd</function>.
+ See also <function>system</function>,
+ <function>passthru</function>, <function>exec</function>,
+ <function>popen</function>, and
+ <function>escapeshellcmd</function>.
</para>
-
</sect1>
-
<sect1 id="language.operators.increment">
<title>Incrementing/Decrementing Operators</title>
-
<para>
- PHP supports C-style pre- and post-increment and decrement
- operators.
+ PHP supports C-style pre- and post-increment and decrement
+ operators.
</para>
-
- <table>
- <title>Increment/decrement Operators</title>
- <tgroup cols="3">
- <thead>
- <row>
- <entry>example</entry>
- <entry>name</entry>
- <entry>effect</entry>
- </row>
- </thead>
- <tbody>
- <row>
- <entry>++$a</entry>
- <entry>Pre-increment</entry>
- <entry>Increments $a by one, then returns $a.</entry>
- </row>
- <row>
- <entry>$a++</entry>
- <entry>Post-increment</entry>
- <entry>Returns $a, then increments $a by one.</entry>
- </row>
- <row>
- <entry>--$a</entry>
- <entry>Pre-decrement</entry>
- <entry>Decrements $a by one, then returns $a.</entry>
- </row>
- <row>
- <entry>$a--</entry>
- <entry>Post-decrement</entry>
- <entry>Returns $a, then decrements $a by one.</entry>
- </row>
- </tbody>
- </tgroup>
- </table>
-
+ <table>
+ <title>Increment/decrement Operators</title>
+ <tgroup cols="3">
+ <thead>
+ <row>
+ <entry>Example</entry>
+ <entry>Name</entry>
+ <entry>Effect</entry>
+ </row>
+ </thead>
+ <tbody>
+ <row>
+ <entry>++$a</entry>
+ <entry>Pre-increment</entry>
+ <entry>Increments $a by one, then returns $a.</entry>
+ </row>
+ <row>
+ <entry>$a++</entry>
+ <entry>Post-increment</entry>
+ <entry>Returns $a, then increments $a by one.</entry>
+ </row>
+ <row>
+ <entry>--$a</entry>
+ <entry>Pre-decrement</entry>
+ <entry>Decrements $a by one, then returns $a.</entry>
+ </row>
+ <row>
+ <entry>$a--</entry>
+ <entry>Post-decrement</entry>
+ <entry>Returns $a, then decrements $a by one.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
<para>
- Here's a simple example script:
- <informalexample>
- <programlisting>
+ Here's a simple example script:
+ <informalexample>
+ <programlisting role="php">
<?php
echo "<h3>Postincrement</h3>";
$a = 5;
@@ -326,82 +375,82 @@
$a = 5;
echo "Should be 4: " . --$a . "<br>\n";
echo "Should be 4: " . $a . "<br>\n";
-?>
- </programlisting>
- </informalexample>
+?>
+ </programlisting>
+ </informalexample>
</para>
-
</sect1>
-
<sect1 id="language.operators.logical">
- <title>Logical Operators</title>
-
- <table>
- <title>Logical Operators</title>
- <tgroup cols="3">
- <thead>
- <row>
- <entry>example</entry>
- <entry>name</entry>
- <entry>result</entry>
- </row>
- </thead>
- <tbody>
- <row>
- <entry>$a and $b</entry>
- <entry>And</entry>
- <entry>True if both $a and $b are true.</entry>
- </row>
- <row>
- <entry>$a or $b</entry>
- <entry>Or</entry>
- <entry>True if either $a or $b is true.</entry>
- </row>
- <row>
- <entry>$a xor $b</entry>
- <entry>Or</entry>
- <entry>True if either $a or $b is true, but not both.</entry>
- </row>
- <row>
- <entry>! $a</entry>
- <entry>Not</entry>
- <entry>True if $a is not true.</entry>
- </row>
- <row>
- <entry>$a && $b</entry>
- <entry>And</entry>
- <entry>True if both $a and $b are true.</entry>
- </row>
- <row>
- <entry>$a || $b</entry>
- <entry>Or</entry>
- <entry>True if either $a or $b is true.</entry>
- </row>
- </tbody>
- </tgroup>
- </table>
+ <title>Logical Operators</title>
+ <table>
+ <title>Logical Operators</title>
+ <tgroup cols="3">
+ <thead>
+ <row>
+ <entry>Example</entry>
+ <entry>Name</entry>
+ <entry>Result</entry>
+ </row>
+ </thead>
+ <tbody>
+ <row>
+ <entry>$a and $b</entry>
+ <entry>And</entry>
+ <entry>True if both $a and $b are true.</entry>
+ </row>
+ <row>
+ <entry>$a or $b</entry>
+ <entry>Or</entry>
+ <entry>True if either $a or $b is true.</entry>
+ </row>
+ <row>
+ <entry>$a xor $b</entry>
+ <entry>Or</entry>
+ <entry>True if either $a or $b is true, but not both.</entry>
+ </row>
+ <row>
+ <entry>! $a</entry>
+ <entry>Not</entry>
+ <entry>True if $a is not true.</entry>
+ </row>
+ <row>
+ <entry>$a && $b</entry>
+ <entry>And</entry>
+ <entry>True if both $a and $b are true.</entry>
+ </row>
+ <row>
+ <entry>$a || $b</entry>
+ <entry>Or</entry>
+ <entry>True if either $a or $b is true.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
<simpara>
- The reason for the two different variations of "and" and "or"
- operators is that they operate at different precedences. (See
- <link linkend="language.operators.precedence">Operator
- Precedence</link>.)
+ The reason for the two different variations of "and" and "or"
+ operators is that they operate at different precedences. (See
+ <link linkend="language.operators.precedence">Operator
+ Precedence</link>.)
</simpara>
</sect1>
- <sect1 id="language.operators.precedence">
- <title>Operator Precedence</title>
- <para>
- The precedence of an operator specifies how "tightly" it binds
- two expressions together. For example, in the expression
- <literal>1 + 5 * 3</literal>, the answer is 16 and not
- 18 because the multiplication ("*") operator has a higher precedence
- than the addition ("+") operator.</para>
- <para>
- The following table lists the precedence of operators with the
- lowest-precedence operators listed first.
-
+ <sect1 id="language.operators.precedence">
+ <title>Operator Precedence</title>
+ <para>
+ The precedence of an operator specifies how "tightly" it binds two
+ expressions together. For example, in the expression <literal>1 +
+ 5 * 3</literal>, the answer is <literal>16</literal> and not
+ <literal>18</literal> because the multiplication ("*") operator
+ has a higher precedence than the addition ("+") operator.
+ Parentheses may be used to force precedence, if necessary. For
+ instance: <literal>(1 + 5) * 3</literal> evaluates to
+ <literal>18</literal>.
+ </para>
+ <para>
+ The following table lists the precedence of operators with the
+ lowest-precedence operators listed first.
<table>
<title>Operator Precedence</title>
<tgroup cols="2">
@@ -434,7 +483,9 @@
</row>
<row>
<entry>left</entry>
- <entry>= += -= *= /= .= %= &= |= ^= ~= <<= >>=</entry>
+ <entry>
+ = += -= *= /= .= %= &= |= ^= ~= <<= >>=
+ </entry>
</row>
<row>
<entry>left</entry>
@@ -462,7 +513,7 @@
</row>
<row>
<entry>non-associative</entry>
- <entry>== != ===</entry>
+ <entry>== != === !==</entry>
</row>
<row>
<entry>non-associative</entry>
@@ -494,33 +545,36 @@
</row>
</tbody>
</tgroup>
- </table></para></sect1>
+ </table>
+ </para>
+ </sect1>
<sect1 id="language.operators.string">
<title>String Operators</title>
<simpara>
- There are two string operators. The first is the concatenation
- operator ('.'), which returns the concatenation of its right and
- left arguments. The second is the concatenating assignment
- operator ('.='). Please read <link
- linkend="language.operators.assignment">Assignment
- Operators</link> for more information.
+ There are two string operators. The first is the concatenation
+ operator ('.'), which returns the concatenation of its right and
+ left arguments. The second is the concatenating assignment
+ operator ('.='), which appends the argument on the right side to
+ the argument on the left side. Please read <link
+ linkend="language.operators.assignment">Assignment
+ Operators</link> for more information.
</simpara>
+
<para>
- <informalexample>
- <programlisting>
+ <informalexample>
+ <programlisting role="php">
$a = "Hello ";
$b = $a . "World!"; // now $b contains "Hello World!"
$a = "Hello ";
-$a .= "World!"; // now $a contains "Hello World!"
+$a .= "World!"; // now $a contains "Hello World!"
</programlisting>
- </informalexample>
+ </informalexample>
</para>
</sect1>
-
- </chapter>
+ </chapter>
<!-- Keep this comment at the end of the file
Local variables:
@@ -532,7 +586,7 @@
sgml-indent-step:1
sgml-indent-data:t
sgml-parent-document:nil
- sgml-default-dtd-file:"../manual.ced"
+ sgml-default-dtd-file:"../../manual.ced"
sgml-exposed-tags:nil
sgml-local-catalogs:nil
sgml-local-ecat-files:nil
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