PHP 8.6 migration guide - #5900
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lacatoire
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Oct 1, 2026
| <link linkend="object.isset">__isset()</link> has materialized the | ||
| property by writing into the property table. | ||
| The freshly-written value is returned directly. | ||
| <function>isset</function> is unaffected. |
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| <function>isset</function> is unaffected. | |
| <function>isset</function> applied directly to the property is unaffected; | |
| nested forms such as <literal>isset($o->p['k'])</literal> follow the same | |
| path as <literal>??</literal>. |
lacatoire
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Oct 1, 2026
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| (big-endian) modifiers after the signed and unsigned integer format codes, | ||
| and after the float and double format codes. |
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| (big-endian) modifiers after the signed and unsigned integer format codes, | |
| and after the float and double format codes. | |
| (big-endian) modifiers after the <literal>s</literal>, <literal>S</literal>, | |
| <literal>l</literal>, <literal>L</literal>, <literal>q</literal> and | |
| <literal>Q</literal> integer format codes, and after the | |
| <literal>f</literal> and <literal>d</literal> float and double format codes. |
lacatoire
reviewed
Oct 1, 2026
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| <para> | ||
| Added the <literal>"write_seek_mode"</literal> filter parameter for the | ||
| bz2, iconv, zlib, and <link linkend="filters.string">string</link> stream |
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| bz2, iconv, zlib, and <link linkend="filters.string">string</link> stream | |
| bz2, iconv, zlib, and <link linkend="filters.convert">convert</link> stream |
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This migration guide is based on the PHP 8.6 UPGRADE NOTES.
If you do notice anything is missing from the UPGRADING file, please include it and let us know so we can reflect that in the guide.