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Docs: document intval() behavior with scientific notation #5100

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2849936
Docs: clarify intval() behavior with scientific notation overflow
anshujain0 Jan 13, 2026
91fee98
docs: clarify is_numeric support for scientific notation strings
anshujain0 Jan 14, 2026
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25 changes: 17 additions & 8 deletions reference/var/functions/intval.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -160,14 +160,23 @@ echo intval(true), PHP_EOL; // 1
</refsect1>

<refsect1 role="notes">
&reftitle.notes;
<note>
<para>
The <parameter>base</parameter> parameter has no effect unless the
<parameter>value</parameter> parameter is a string.
</para>
</note>
</refsect1>
&reftitle.notes;
<note>
<para>
The <parameter>base</parameter> parameter has no effect unless the
<parameter>value</parameter> parameter is a string.
</para>
</note>
<note>
<para>
When converting strings that contain scientific notation (for example,
"42.42e42"), <function>intval()</function> may return
<constant>PHP_INT_MAX</constant> due to integer overflow. This occurs
when the parsed numeric value exceeds the maximum integer size supported
by the platform.
</para>
</note>
</refsect1>

<refsect1 role="seealso">
&reftitle.seealso;
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11 changes: 11 additions & 0 deletions reference/var/functions/is-numeric.xml
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Expand Up @@ -68,6 +68,17 @@
</informaltable>
</refsect1>

<refsect1 role="notes">
&reftitle.notes;
<note>
<para>
Strings containing numbers in scientific notation (for example,
<literal>"1e3"</literal> or <literal>"42e2"</literal>) are considered
numeric by <function>is_numeric</function>.
</para>
</note>
</refsect1>

<refsect1 role="examples">
&reftitle.examples;
<para>
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